Glossary

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Correct.svg This page is currently a draft. More information pertaining to this may be available on the talk page.

This page aims to collect and present concise definitions of the terms used in communication within the Wikimedia movement. Links are fine, but shouldn't replace a proper plain English explanation of the terms.

Please note that this collection is to be focused on the meta-level rather than project-level, so terms used exclusively at Wikipedia should not be placed here. See below for links to project glossaries, of which two of the largest are the MediaWiki glossary and the Wikipedia glossary.

A B C D E F G H  I  J K L M N O P Q R S T U V W X Y Z · See also

0–9[edit]

+1
  1. In communication (on wiki, IRC, e-mail, mailing lists) the action to agree with a previous statement.
  2. In Code review jargon, the action to review a commit and agree with its purpose and implementation.
  3. By metonymy, the technical ability to do this action in the Code review interface.
+2
  1. In Code review jargon, the action to review a commit, accept its purpose and implementation and make it part of the code.
  2. By metonymy, the technical ability to do this action in the Code review interface.

A[edit]

AbuseFilter (also edit filter) 
refers to an extension used to create filters (like anti-spam filters) or to one of the aforementioned filters itself
Active project 
any Wikimedia project with at least 100 articles.
For more information see: Which projects are active?
Administrator 
also admin - someone with administrative rights on a wiki, which includes the rights to delete pages and block other users. Standards for being given admin rights vary widely across projects. Also sometimes called sysops, janitors, bibliotecarios, moderator, etc.
AffCom
Abbreviation of Affiliations Committee.
Affiliations Committee
a Wikimedia community committee entrusted with advising the Board of Trustees on the approval of new movement affiliates: national or subnational chapters, thematic organisations and user groups.
AFT
Abbreviation of Article feedback tool.
Anonymous
also anon, anonymous editor, in a wiki context, someone who hasn't logged in when they edit and therefore displays their IP address in the edit history / list of contributions
Anti-vandalism
Archive
Autoconfirmed 
AWB 
AutoWikiBrowser, a tool to make rapid semi-automated edits; often used for lots of repetitive minor changes
Article feedback
Automatic conversion

B[edit]

Babel
refers to multilingualism. Specifically may mean
  1. the "babel template", which is used across Wikimedia projects for users to indicate what languages they speak. To use it, place {{babel|en-N|es-1}} on your user page, replacing the language codes and numbers as appropriate -- N means native speaker/mother tongue, while 1 is minimal knowledge.
  2. the multilingual discussion board on meta
backlog
a backed-up list of to-do items that need to be dealt with on a wiki. For instance, most wikis have a cleanup backlog, with a long list of pages that need to be cleaned up in some way. Backups often suffer from not having enough editors working on them.
Blacklist
Board of Trustees
All incorporated entities have Boards; the term Board of Trustees or just Board often refers to the Wikimedia Foundation Board of Trustees, a partially community-elected, partially-appointed body of 10 volunteers who are responsible for governance and oversight of the WMF.
Boldness
as referenced in the Wikipedia principle "be bold!", refers to the wiki principle of: you have the edit button, so use it boldly!
Bot
short for "robot", a script that makes repetitious automated edits according to a preset algorithm. There are thousands of bots operating on the Wikimedia projects; see bot.
Bug wrangler
Person responsible for sorting and solving bug reports in Bugzilla.
Bugmeister
See Bug wrangler.
Bugzilla
Website to track bug reports and feature requests for MediaWiki, powered by the Bugzilla software.

C[edit]

Categories
CC
Creative Commons (licenses)
Centralnotice
Chapters committee 
also chapcom: a committee that worked on approving new chapters, now replaced by the Affiliations Committee.
Chapter 
see Wikimedia chapter
Chapters Meeting
Annual physical meeting of representatives of the Wikimedia Chapters organized since 2008.
Cleanup
C-levels
upper management at the WMF. For instance, the CTO, CFO, etc. The 'C' stands for 'chief': 'chief technical officer'. See also en:Corporate title.
Cluster
Code review
Comcom 
Abbreviation for Communications committee
Commit
A change to one or more files, usually software code, managed in the git version control system
Committee 
a group of volunteers charged with advising the Board of Trustees and taking care of a specific part of the Foundation's activities.
For more information see: Wikimedia committees
Committer
anyone granted the permission to make commits to a shared git/svn repository
Commons
Can refer to:
Creative Commons (licenses)
Wikimedia Commons (Wikimedia project)
Communications Committee
Community 
The people working on a particular wiki. Within Wikimedia, often used to refer to Wikimedia project editors in general, as in "the community", or to the subset that works on a particular project: "the Wikibooks community". There is little consensus about who exactly is a part of the community (though if you participate in some way on the projects you're probably part of it, and if you self-identify as a community member you definitely are), but the term often is used to mean those editors who share a sense of ownership in a particular site and participate in a sustained way on it, including working on policies, behind-the-scenes tasks, etc.: work that is not necessarily visible to casual readers or editors. Also refers to having a sense of "community": that is, sharing common values and working towards similar goals in a common way.
Consensus
An elusive term, referring to the principle of making decisions by a mechanism of discussion and proposal revision that results in consensus among the parties participating in the discussion (as opposed to other decision making mechanisms, such as voting or top-down decrees). Consensus-building values reasoned arguments, inclusiveness and building compromise, and is a time-intensive process. It co-exists in the wiki world with the principle of "being bold."
ContentHandler
Continuous integration
Copyvio
abbreviation for a copyright violation.
Core
  1. Core operations, activities or expenses of an entity like the Wikimedia Foundation or a Wikimedia chapter.
  2. MediaWiki core.
Country codes
a two-letter code used to refer to a country, often used when identifying national level chapters. Wikipedias are named after language codes, which are a distinct two or three letter code (though sometimes the same as that used to refer to a country).
Creative Commons
Refers to either the Creative Commons free licenses, which all of the Wikimedia wikis use; or to the the organization that develops the licenses.

D[edit]

DB
Abbreviation of Database.
Data dump
Database
Datacenter
Deployment
Designer
Dev
Short for Developer.
Developer 
Someone who works on the MediaWiki software.
Diff
The difference between one revision of a wiki page and another. Diffs are viewable from the edit history of a page.
Disambiguation
Differentiating between similarly-named items; often 'disambiguation page', which is a wiki page that disambiguates between similar terms, such as a Wikipedia article about several people that share the same name.
Double redirect
A page that redirects to a second page that in turn redirects to a third page. Double redirects do not work -- the redirect mechanism only works if it's one step -- so these should be fixed by changing the first redirect page to point to the ultimate destination (the third page).
Dump
Abbreviation of Data dump.

E[edit]

E2, EE
Abbreviation of the Editor engagement team at the WMF.
E3
Abbreviation of Editor engagement experiments team.
EQIAD
Washington DC Datacentre (EQ = Equinix, IAD = Washington Dulles Airport)
Echo
Editathon or edit-a-thon
Edit conflict
When two people try to edit the same portion of the same wiki page at the same time; this results in a conflict where only one person can save their revision and the second person gets a notice that there is a conflict. With sections and improvements in the software these are less common than they used to be.
Editor 
someone who edits a wiki (regardless of the type of edit they make). There are no hard and fast standards for what makes someone "an editor", beyond making an edit somewhere, but the term is often used to mean people who are part of that wiki's community.
Editor engagement
Editor engagement experiments
Edit summary
a brief summary of an edit that is entered in the box at the bottom of the edit window; meant to explain to other readers/editors what the edit is all about. Edit summaries show up in recent changes, the page history, and the list of an indivdual editor's contributions.
edit war
a back-and-forth dispute between two or more editors, each revising the page as they see fit and reverting the other's edits. Led to the "three-revert rule" on the English Wikipedia. Edit warring is considered bad form; those involved are supposed to take it to the talk page and battle it out in discussion.
Embassy
Engineer
ESAMS
Amsterdam Datacentre (ES = EvoSwitch, AMS = Amsterdam Schipol Airport)
Existing Wikimedia chapter 
see Official Wikimedia chapter
Extension
additional software that adds features to MediaWiki core code. Developers have written over 2000 extensions to draw chemical formulae, embed maps, enhance the editor, etc. etc. Take a look at the extensions running on this wiki.
External links
Links to non-wiki pages, that is to external websites. On the Wikimedia projects, there are usually conventions for how and where these should be placed.

F[edit]

Features
FAQ
Frequently Asked Questions, sometimes used preemptively as a format for an explanatory document about a proposal/project.
FDC
Funds Dissemination Committee, a committee set up to distribute large grants to movement entities
File
Fishbowl wikis
wikis that are not publicly editable, but are publicly readable. See Wikimedia_wikis#Fishbowl_wikis.
Foundation 
see Wikimedia Foundation
Foundation-l 
the former name for the Wikimedia-l mailing list
Free Content
content (writing, scientific work, images, creative works, etc) that is unhampered by restrictive copyright. See freedomdefined.org for a detailed definition.
Fundcom 
see Fundraising committee
Fundraising campaign 
also annual campaign, the (historically held in November-December) annual campaign of displaying banners on the Wikimedia projects to raise funds.

G[edit]

GAC
abbreviation of Grant Advisory Committee, a group of volunteers from the community reviewing proposals for the Wikimedia Grants Program, and advising both applicants and the Foundation.
Gadget
Ganglia
A system monitor tool (used to view statistics about the Wikimedia grid)
GeoData
Gerrit
A git code review tool (used for Wikimedia code review)
GFDL
A free content license that was used on the Wikimedia projects until the switch to Creative Commons licenses.
Git
a wildly-successful "distributed version control system" that tracks changes to the files for a project.
GLAM
is an acronym for Galleries, Libraries, Archives and Museums: the term is often used to refer broadly to all cultural institutions of this type, or Wikimedia outreach to this type of institution.
Global block
Global rights
Global sysop
GPL
GNU General Public License. MediaWiki software is released under this license.
Grants
the giving of movement funds to support volunteer projects, as in the Wikimedia Foundation's Wikimedia Grants Program and several Wikimedia chapters' grants programs. See also the Funds Dissemination Committee (FDC)

H[edit]

Hackathon
Het deploy
see Heterogeneous deployment
Heterogeneous deployment
History
Hook

I[edit]

i18n
see internationalization
Icinga
computer, network, and infrastructure monitoring software. See also #Ganglia
Incubator
see Wikimedia Incubator
Internationalization
Interwiki
see Help:Interwiki linking
IPA
IPv6
a new version of the Internet Protocol to connect computers on the net.
IRC
Internet Relay Chat

J[edit]

J2ME app
Jenkins
Jimbo
User:Jimbo Wales, aka Jimmy Wales, founder of Wikipedia and the Wikimedia Foundation

K[edit]

KNAMS
Amsterdam Datacentre (KN = Kennisnet, AMS = Amsterdam Schipol Airport)
Kaltura
a software company working on open-source video tools, engaged in a partnership with the Wikimedia Foundation since 2008 to improve the integration of video on Wikimedia projects. TimedMediaHandler was developed as part of this partnership.
Kiwix
Kraken
the upcoming data services platform that the Wikimedia Foundation's Analytics team is working on. It will allow interested persons to query data to answer their questions about Wikimedia projects and users.

L[edit]

L10n
See Localization
Labs
Abbreviation of Wikimedia Labs.
Langcom
Abbreviation of Language committee
Langlink
Language codes
the short (two or three character) ISO codes that are used to identify languages, used in Wikimedia to identify language editions of the projects. For example, "en" is English, "es" is Spanish (Español), etc.
Language engineering
LevelUp
Limn
A javascript GUI visualization toolkit, used by the Wikimedia Report Card.
LiquidThreads
A threaded discussion extension for MediaWiki
Local chapter 
see Wikimedia chapter
Localization

M[edit]

Magic word
Main Page
Mainspace
Markup
Annotations to text that change its behavior and appearance. Click [Edit] on this page to see its wikitext markup, which the MediaWiki software turns into HyperText Markup Language, the native format of web pages.
MediaWiki
a wiki engine (software) originally developed for and used by Wikimedia projects, but also used by many other organizations. Also sometimes refers to the wiki about the software, MediaWiki.org.
MediaWiki core
The main code implementing MediaWiki, also the git repository mediawiki/core holding it. Most MediaWiki installations run numerous extensions as well.
MediaZilla
Archaic name for Bugzilla
Meetup
Memcached
Merge
Meta 
see Wikimedia Meta-Wiki.
MicroDesign
see Micro Design Improvements
Minor edit
Mirror
Mobile
MobileFrontend
MySQL
 
see MediaWiki

N[edit]

Nagios
what WMF used before #Icinga
Namespace
mw:Extension:Narayam
Newbies
short for newcomers.
Newcomer
NFS
Notifications
NPOV

O[edit]

Office 
Wikimedia Foundation office in San Francisco, California, USA and staff working at that office.
For contact details, see the Contact us page on the Foundation website.
Office actions
refers to editing/sysop actions taken by the WMF Office, usually for legal reasons.
Officers 
  1. the Board of Trustees
  2. people with official positions within the Wikimedia Foundation
Official Wikimedia chapter 
the Wikimedia chapter which has signed a chapter agreement with the Wikimedia Foundation. This term is used to differentiate between chapter in forming and established entities, endorsed by the Wikimedia Foundation.
Onboarding
the process of bringing a new hire or new user up to speed.
Orphan
OTRS
the ticket response system used to answer Wikimedia project emails
Operations (Ops)
  1. The activity to keep Wikimedia projects running from a technical perspective, e.g. maintaining and improving the servers and the network.
  2. By metonymy, the people (system administrators) engaged in this activity.
Ops
See Operations
Originals
PMTPA
One of the Florida Datacentres (PM = Power Medium, TPA = Tampa Airport)

P[edit]

Page
Page curation
Page triage
Parser
(in the context of the MediaWiki software) a program that translates wikitext into HTML that browsers can display.
Parsoid
A rewrite of the MediaWiki parser for use with the VisualEditor.
Patchset
patrol
PD
Public domain, set of works whose intellectual property rights have expired, been forfeited, or are inapplicable.
Performance
Permalink
A permanent link to a particular revision of a wiki page, which can be accessed by 1) clicking "permanent link" under the 'toolbox' in the default MediaWiki skin; 2) from the page history, clicking on the date/time link of the revision you want. This is very useful for providing attribution.
PHP
the scripting language in which most of the MediaWiki code (core and extensions) is written.
Planet
see Planet Wikimedia.
POV
Point of view; see also NPOV.
Product
Production
Productize
a terrible corporate-speak word that everyone should cease using immediately. Also, a term referring to making a product out of something.
Project 
a form of organized activity undertaken by WMF, a chapter or members of the community (e.g. Wikiprojects). This term is often used to reference Wikimedia projects (i.e. the wikis: Wikipedia, Wiktionary, etc.), although it actually has a much broader meaning.
Project namespace 
A namespace that refers to the wiki itself, typically used to collect policies, guidelines, and help pages specific to that wiki. Examples include "Wikipedia:" on the English Wikipedia and "Meta:" on this wiki. On a MediaWiki-based wiki, this namespace can be referred to by using the prefix "Project:".
Proxy
Pseudo-namespace
A prefix used in a wikilink that does not correspond to a real namespace on the wiki. This is often used to refer to a real namespace (especially the "Project" namespace) in a shortened form — for example, "WP:" on the English Wikipedia. Sometimes (as with the previous example) the pseudo-namespace is promoted to an official alias of the true namespace; in other cases (such as "MOS:" on the English Wikipedia), the correspondence is accomplished by using redirects.
Puppet
a program used by the Operations team that automates configuration of the Wikimedia servers, for ease in replication, troubleshooting, and collaborative development.
See also sockpuppet.
Pywikipediabot
Python Wikipedia Bot framework (PWB)

Q[edit]

QA
Abbreviation of Quality assurance.
Quality assurance

R[edit]

Random page
A link (Special:Random) that displays in the left-hand sidebar in the default MediaWiki skin, that takes you to any main-namespace page on the wiki.
RC
Abbreviation for Recent Changes
Recent changes
A list of all of the edits that are happening, in real time, on the wiki. Accessible via Special:RecentChanges or via a link in the left-hand sidebar in the default MediaWiki skin. Less useful on very large and busy wikis than it is on smaller wikis. The Special:RecentChanges page can be customized with links to subsets of changes, for instance all changes by IPs or all new pages.
Redirect
a wiki page that only points to another wiki page, or "redirects" there; these are often used in wiki projects to direct readers from synonyms, alternate spellings, etc. to the proper article. The code to create a redirect is #REDIRECT [[page name]]. To redirect Page A to Page B therefore, you would edit Page A and just place #REDIRECT [[Page B]] in the edit window for Page A then save the page. Redirects are not counted in the official article count of a project.
Red link
a wiki page that doesn't exist yet but is linked to from another wiki page; these wikilinks to blank pages are shown in the default skin as red text. Clicking on a red link takes you to a place to create the page.
Refactor
Release
Rename
Replication
Report card
graphs of key metrics at http://reportcard.wmflabs.org/, presented at the Monthly metrics meeting.
RFC
Request for comment
RFD
Request for deletion
Roadmap
see mw:Roadmap
Rollback
Round-trip
RSpec
A sophisticated assertion library for the Ruby programming language
Ruby
A dynamically-typed programming language particularly useful for browser testing

S[edit]

SAL
Abbreviation of Server admin log.
Sandbox
An area of the wiki, usually a specific wiki page, where users are encouraged to make test edits; usually the sandbox is used for learning or experimenting with formatting and is regularly cleared out (by blanking the page).
SPF
Sender Policy Framework, an e-mail anti-forgery system
SUL
Abbreviation of Single user login.
Scap
Abbreviation of sync-common-all-php. Script used by devops to push code updates to the production servers.
SDTPA
One of the Florida Datacentres (SD = Switch and Data (Now 365 Main), TPA = Tampa Airport)
Security
Server
Server admin log
Shell
Shortcut
A code set up to abbreviate a particular namespace so that "shortcut code" pages can be created. For instance, on Wikipedia, there is a shortcut WP for the Wikipedia namespace, which can lead to pages like WP:MOS (which is a redirect to Wikipedia:Manual of Style). Handy for saving typing and remembering the location of commonly-used procedure pages, but also a source of much insider jargon in discussion, which is a perennial source of irritation for those who don't know the codes.
Single user login
alternate term for the unified login system used across Wikimedia wikis. Implemeneted by CentralAuth extension to MediaWiki.
Sister projects
All of the Wikimedia projects that aren't Wikipedia -- a catch-all term for referring to these wikis.
Skin
a collection of code and settings that affects the appearance and behavior of a MediaWiki installation. MediaWiki's default skin is called Vector, you can preview and choose another in Preferences > Appearance.
Sockpuppet
Spam
Spam-bot
special pages
A collection of MediaWiki pages that serve various functions, all prefixed by "Special". These pages reflect tools that are a part of the MediaWiki code and can't typically be edited or modified. For instance, Special:Statistics counts how many pages and users are on the wiki. A link to the list of special pages can be found under "toolbox".
Speedy
Usually used to refer to "speedy deletion", which means deleting a page without referring to the usual deletion procedures on the wiki. For instance, pages that are strictly spam with no redeeming content are often speedily deleted.
Squid
Steward
An Administrator who has been empowered to change any user's status on any Wikimedia Foundation project, including granting and revoking Administrator status and granting bureaucrat status. Stewards are elected on Meta.
Stub dump
An incremental data dump.
SUL
see Single user login
SVG
Swift
OpenStack's distributed storage component software

T[edit]

TAE
Abbreviation of Total active editors
Tag
Talk pages
Tarball
TechOps
Abbreviation of Technical operations.
Template
Testswarm
TimedMediaHandler
TimedText 
TimedText, a custom namespace for Commons, numbered 102, to hold closed caption text ("Timed Text")
TMH
Abbreviation of TimedMediaHandler.
TMPTA
TOC
short for "Table of Contents", which is automatically generated by using three or more section headings in a wiki page.
Toolbox
Tool labs
Toolserver
a host for software tools written and used by the Wikimedia community. Toolserver is operated by Wikimedia Deutschland e.V. with assistance from the Wikimedia Foundation.
Torrus
Total active editors
a key metric that WMF tracks on the Report card to measure the health of Wikimedia. See its analytics definition
TR 
Abbreviation of Translation requests.
Transclusion
Translation requests 
a space on Meta-Wiki dedicated to such requests.
translatewiki.net
Transwiki
see Help:Transwiki
TWN
Abbreviation of translatewiki.net.

U[edit]

UCOSP
udp2log
ULS
ULSFO
San Francisco Datacentre (UL = United Layer, SFO = San Francisco Airport)
URV
German abbreviation meaning "Copyright infringement" or "copyvio". See Help:URV.
UX
Abbreviation of User experience.
User Experience
Wikimedia user groups are groups of Wikimedia volunteers that are organized and approved by the Affiliations Committee

V[edit]

Vagrant
Software that sets up a "virtual computer" running, e.g. a MediaWiki installation, on your actual computer.
Vandalism
Varnish
Software that routes web site requests to appropriate clusters.
Vector
The default skin for MediaWiki since 2010, also an extension that adds some features and preferences.
Village pump
VisualEditor
a WMF project to let users edit wiki pages without dealing with the underlying wikitext markup ([[a link]] {{template|param}} ''italics'', etc.).
Volunteer
Depending on the context, this can refer to the Editors of the content projects, a volunteer contributor to the MediaWiki software, the active members of the Wikimedia Chapters, or any combination. Volunteers are unpaid, but can have an official function within the organizations (board member, etc).
VFD

W[edit]

WCA
Abbreviation of Wikimedia Chapters Association.
WebFont
wiki 
A generic term describing a collaborative website that can be edited by its visitors.
Wikibooks
Wikidata
A Wikimedia project focused on building a free knowledge base. Along with Wikisource, the newest Wikimedia project.
Wikidata
A Wikimedia project developed by Wikimedia Deutschland, which focuses on collecting and building a repository of data about the world, including interwiki language links between Wikipedia entries. There is only one Wikidata site, which is multilingual. With WikiVoyage, the newest Wikimedia project.
WikiDOM
WikiEditor
Wikify
To apply appropriate wiki markup to a page, such as linking terms or changing a manually numbered list into an automatically formatted one. Sometimes also used to refer to changes that enforce specific wiki policies or guidelines.
wikilink
A link from one page to another on the same wiki, accomplished by surrounding the page name by double square brackets, [[like this]]. This is also sometimes known as an internal link to distinguish it from an external link to a page on a different wiki or a non-wiki. A link to a page on another wiki is also called an interwiki link.
Wikilove
Wiki Loves
A concept developed by multiple Wikimedia Chapters where a competition is organized in order to get more people involved with the Wikimedia projects and at the same time collect more content. See also Wiki Loves Art and Wiki Loves Monuments.
Wiki Loves Art
Wiki Loves Monuments
Wikimania 
An annual international conference held by the Wikimedia Foundation and centred around various aspects of the Wikimedia movement.
Wikimania bid jury
A group of volunteers that is organized every year to review, and decide among, the community bids to host Wikimania. Sometimes just Wikimania jury or bid jury.
Wikimedia 
See Wikimedia movement.
Wikimedia chapter 
A corporation dedicated to the promotion and dissemination of free content created within Wikimedia projects. A Wikimedia chapter supports Wikimedia Foundation on a specific geographic (usually national) level.
Wikimedia Chapters Association 
Wikimedia Commons
A Wikimedia project focused on collecting free media files, primarily images. There is only one Commons site, which is multilingual.
Wikimedia Conference
A name used for Wikimania, the Chapters Meeting, a world-wide Hackathon or a combination of those.
Wikimedia Foundation 
An international non-profit organization dedicated to encouraging the growth, development and distribution of free, multilingual content, and to providing the full content of Wikimedia projects to the public free of charge.
Wikimedia Incubator 
Where potential new language versions of existing Wikimedia Foundation projects (Wikipedia, Wiktionary, Wikiquote, etc.) have their own wikis. There they are arranged, written, tested, and proven worthy of Wikimedia hosting.
Wikimedia-l
A mailing list for discussing the Wikimedia community and related organizations.
Wikimedia Labs 
A two-part Wikimedia project aimed at helping volunteers get involved in Wikimedia operations and MediaWiki related software development. The first part of this project is Test/Dev Labs, and the second part is Tool Labs.
Wikimedia mark 
See Wikimedia trademark.
Wikimedia Meta-Wiki 
This website, a wiki used to discuss various issues affecting all Wikimedia projects. Often shortened to "Meta".
For more information see: Meta:About.
Wikimedia movement 
The whole of people and efforts centered around Wikimedia projects, it encompasses Wikimedia Foundation, its chapters, thematic organizations, user groups and the community.
Wikimedia thematic organization 
Incorporated independent non-profits representing the Wikimedia movement and supporting work focused on a specific theme, topic, subject or issue within or across countries and regions. Thematic or focused organizations use a name clearly linking them to Wikimedia and are granted use of Wikimedia trademarks for their work, publicity and fundraising.
Wikimedia user group 
Select words, symbols, and phrases are the legally registered trademarks of the Wikimedia Foundation. They may only be used on the Wikimedia Foundation projects and by approved Wikimedia Foundation partners or movement organizations - such as chapters, thematic organizations, and user groups.
Wikimedia user group 
Open membership groups with an established contact person and history of projects, designed to be easy to form. User groups may or may not choose to incorporate and are granted limited use of the Wikimedia trademarks for publicity related to events and projects.
Wikimedian 
A general term for a person contributing to one or several Wikimedia projects. Each project has its own, more specific name for its contributors (e.g., Wikipedian, Wikinewsie, etc.).
Wikimedia project 
A wiki-based internet service maintained by the Wikimedia Foundation (e.g. Wikipedia, but also Wiktionary, Wikibooks, etc.). There are more than 800 projects in well over 200 languages.
Wikimeetup 
A meeting of Wikimedians of a certain area. Typically wikimeetups are announced in advance on the appropriate project wiki.
Wikinews
A Wikimedia project focused on citizen journalism and writing news stories. Available in many language editions.
Wikipedia
A Wikimedia project focused on writing encyclopedia entries. Available in many language editions.
Wikipedia Zero
WikiProject
Wikiquote
A Wikimedia project focused on collecting quotations. Available in many language editions.
Wikisource
A Wikimedia project focused on collecting original source texts. Available in many language editions.
Wikispecies
A Wikimedia project focused on collecting species and taxonomy information. There is only one Wikispecies site, which is multilingual.
Wikistats
Wikitech
Wikitext
The text of a page on a wiki before it is processed and rendered as an HTML page. It is what users edit when they change a page. Wikitext includes regular text and wiki markup.
Wikiversity
A Wikimedia project focused on teaching and learning, including building and collecting free educational resources such as lesson and course plans and materials. Available in many language editions.
Wikivoyage
A Wikimedia project focused on building a free travel guide for all parts of the world. Available in many language editions. Along with Wikidata, the newest Wikimedia project.
Wiktionary
A Wikimedia project focused on developing a free multilingual dictionary. Available in many language editions.
WLM
Abbreviation of Wiki Loves Monuments.
WM
Abbreviation of Wikimedia.
WMCH, WMDE, WMFR, WMNO, WMRU, WMSE, WMUK, etc.
National chapters of the Wikimedia Foundation in the specified country (CH = Switzerland, DE = Germany, etc.).
WMF
Abbreviation of Wikimedia Foundation.
WP
An abbreviation for Wikipedia (often, but not always, the English one). When used in the English Wikipedia, this is a "pseudo-namespace" prefix for a policy, guideline, or essay. If a user suggests that you read/follow/avoid WP:XYZ (where XYZ is any string of characters) without linking the reference to the appropriate page, just copy WP:XYZ into the search window to see what it corresponds to. When used on other wikis, you may need to go to the English Wikipedia to search for it.

X[edit]

XFF
see XFF project

Y[edit]

Z[edit]

See also[edit]