eonism.
The pretence of being the opposite sex, especially that by a man of being a woman; transvestism.
Meaning & usage
The pretence of being the opposite sex, especially that by a man of being a woman; transvestism.
Where this word comes from
Coined in 1920 by the British physician and sexologist Havelock Ellis (1859–1939) after Chevalier d'Eon (1728–1810), a French diplomat, spy and soldier who presented as male for 49 years, then as a female for 33. Ellis had previously used the term sexo-aesthetic inversion.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.