Standard Lemma guide

eonism

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /ˈi.əˌnɪzəm/

1

noun

Meaning 1

The pretence of being the opposite sex, especially that by a man of being a woman; transvestism.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: lifestyle, sexology, sexuality

Examples

  • 2013, C. N. Armstrong, 12: Transvestism, D. Robertson Smith, William M. Davidson (editors), Symposium on Nuclear Sex, Elsevier (Butterworth-Heinemann), page 88, Homosexuals do not as a rule want to change their sex and identity. This is the fundamental anomaly in eonism.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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.

Across languages

Translations

4 source translations are retained for this English entry.

  • French: éonisme — pretence of being the opposite sex — see also transvestism
  • German: Eonismus — pretence of being the opposite sex — see also transvestism
  • German: Transgender — pretence of being the opposite sex — see also transvestism
  • Italian: eonismo — pretence of being the opposite sex — see also transvestism