| Anonymous (a.) Nameless; of unknown authorship; as, an anonymous benefactor; an anonymous letter. Thesaurus Entries closet, cryptonymic, cryptonymous, incognito, inmost, innermost, innominate, interior, intimate, inward, isolated, nameless, personal, private, privy, retired, secluded, sequestered, unacknowledged, undefined, undesignated, unidentified, unknown, unnamed, unrecognized, unspecified, withdrawn, without a name |