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English definition of “anonymous”

anonymous

adjective uk   /əˈnɒn.ɪ.məs/ us    /-ˈnɑː.nə-/
C2 made or done by someone whose name is not known or not made public: The money was donated by an anonymous benefactor. Police said an anonymous caller warned that a bomb was about to go off. An attempt to implant an embryo using an egg from an anonymous woman donor was unsuccessful. He received an anonymous letter threatening to disclose details of his affair if he didn't pay the money. For reasons of personal safety, the informant wishes to remain anonymous. having no unusual or interesting features: He has a rather anonymous face.
anonymously
adverb uk   /-li/ us  
The donation was made anonymously.
(Definition of anonymous from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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