Back-formation from pseudonymous, from French pseudonyme (“pseudonymous”, adjective), from Ancient Greek ψευδώνυμος (pseudṓnumos), from ψευδής (pseudḗs, “false”) and ὄνυμα (ónuma), a dialectal form of ὄνομα (ónoma, “name”). By surface analysis, pseudo- +‎ -onym.

• (UK) IPA^(key): /ˈs(j)uː.də(ʊ).nɪm/
• (US) IPA^(key): /ˈsu.də.nɪm/, /ˈsu.doʊ.nɪm/

• Audio (US):

  (file)

• Audio (General Australian):

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pseudonym (plural pseudonyms)

1. A fictitious name (more literally, a false name), as those used by writers and movie stars.

   Synonym: anonym

   Antonyms: autonym, orthonym, alethonym

   Hyponyms: allonym; ananym; stage name; pen name, nom de plume; nom de clavier, nom de Web; nom de guerre

   Coordinate terms: alias; nickname, moniker, handle

   The Reverend Charles Lutwidge Dodgson wrote "Alice's Adventures in Wonderland" under the pseudonym Lewis Carroll.

   • c. 1911, H. G. Wells, The Obliterated Man:

     I doubt, indeed, whether I should not abandon the struggle altogether—leave this sad world of ordinary life for which I am so ill fitted, abandon the name of Cummins for some professional pseudonym, complete my self-effacement, and—a thing of tricks and tatters, of posing and pretence—go upon the stage.

   • 1928, H.P. Lovecraft, Supernatural Horror in Literature:

     The best example of its literary use so far are the German novel The Golem, by Gustav Meyrink, and the drama The Dybbuk, by the jewish writer using the pseudonym "Ansky".

   • 2025 March 3, Nico Lang, ““Simply Trying to Exist”: How Trans Americans Are Navigating the Confusion and Chaos of Trump’s Passport Policy”, in Them‎^[1], archived from the original on 4 April 2025:

     “I, at first, tried to say, ‘Well, maybe it was an accident. Maybe it got stuck in a printer.’ That was my first thought,” Parker, who requested to go by a pseudonym due to fear of retaliation, tells Them.

• IPA^(key): [ˈpsɛu̯donɪm]

• Audio:

  (file)

pseudonym m inan

1. pseudonym

• “pseudonym”, in Příruční slovník jazyka českého (in Czech), 1935–1957
• “pseudonym”, in Slovník spisovného jazyka českého (in Czech), 1960–1971, 1989
• “pseudonym”, in Nový encyklopedický slovník češtiny (in Czech), 2012–2020
• “pseudonym”, in Internetová jazyková příručka (in Czech), 2008–2026

• IPA^(key): /sœvdonyːm/, [sœwd̥oˈnyːˀm]

pseudonym n (singular definite pseudonymet, plural indefinite pseudonymer)

1. pseudonym

pseudonym

1. pseudonymous

• 👁 Image
  pseudonym on the Danish Wikipedia.Wikipedia ^da

• IPA^(key): [psɔɪ̯doˈnyːm]

• Audio (Germany (Berlin)):

  (file)

pseudonym (strong nominative masculine singular pseudonymer, not comparable)

1. pseudonymous

• alethonym
• orthonym

pseudonym

1. pseudonymously, in a pseudonymous manner

• “pseudonym” in Duden online
• “pseudonym” in Digitales Wörterbuch der deutschen Sprache

• psevdonym

From Ancient Greek ψευδώνυμος (pseudṓnumos).

pseudonym n (definite singular pseudonymet, indefinite plural pseudonym or pseudonymer, definite plural pseudonyma or pseudonymene)

1. pseudonym

• “pseudonym” in The Bokmål Dictionary.

• psevdonym

From Ancient Greek ψευδώνυμος (pseudṓnumos).

pseudonym n (definite singular pseudonymet, indefinite plural pseudonym, definite plural pseudonyma)

1. pseudonym

• “pseudonym” in The Nynorsk Dictionary.

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