This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Having an unknown or unacknowledged name: an anonymous author.

adj. Having an unknown or withheld authorship or agency: an anonymous letter; an anonymous phone call.

adj. Having no distinctive character or recognition factor: "a very great, almost anonymous center of people who just want peace” ( Alan Paton).

adj. Lacking a name; not named and determined, as an animal not assigned to any species.

adj. Without any name acknowledged of a person responsible, as that of author, contributor, or the like.

adj. Of unknown name; whose name is withheld

adj. Lacking individuality.

adj. Nameless; of unknown name; also, of unknown or unavowed authorship

Wanting a name; not named and determined, as an animal not assigned to any species.

Without any name acknowledged, as that of author, contributor, or the like: as, an anonymous pamphlet; an anonymous subscription.

Of unknown name; whose name is withheld: as, an anonymous author.

Often abbreviated to anon.

adj. having no known name or identity or known source

adj. not known or lacking marked individuality

"The man, who wants to remain anonymous, is believed to have picked up the disease when he lived in Indonesia."

unidentified    unknown    unnamed    nameless    faceless   

nameless    unnamed    unknown    unidentified    faceless   

autonomous    synonymous   

early    private    unknown    well-known    literary    confidential    above