From Meta, a Wikimedia project coordination wiki
In the context of wikis, in particular Wikimedia wikis, project can mean:
- all wikis of one kind; for example, Wikipedia and Wikibooks are two projects, each with many language editions; for example, new project policy says "NOTE: An existing project in a new language is not a new project."
- a wiki (in terms of the first meaning: a language edition of a project); for example "proposals for closing projects"
- a subproject within a wiki, e.g. w:Wikipedia:WikiProject Trains. See also w:Wikipedia:WikiProject.