I. adjective 1. (of a person) not identified by name; of unknown name • the donor’s wish to remain anonymous
• an anonymous phone call.
2. having no outstanding, individual, or unusual features; unremarkable or impersonal • his impeccable, slightly anonymous Chelsea flat.
– origin late 16th cent.: via late Latin from Greek anōnumos ‘nameless’ (from an- ‘without’ + onoma ‘name’) + -ous.