- without any name acknowledged, as that of author, contributor, or the like: an anonymous letter to the editor; an anonymous donation.
- of unknown name; whose name is withheld: an anonymous author.
- lacking individuality, unique character, or distinction: an endless row of drab, anonymous houses.
- from or by a person, author, etc, whose name is unknown or withheldan anonymous letter
- having no known name
- lacking individual characteristics; unexceptional
- (often capital) denoting an organization which provides help to applicants who remain anonymousAlcoholics Anonymous