lunacy

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lunacy

  • /ˈluː.nə.si/ UK
  • /ˈljuː.nə.si/ UK
  • /ˈluː.nə.si/ US

Where it comes from

From lun(atic) + -acy.

noun lunacies

  1. countable, uncountable, of a person or group of people A cyclical mental disease, apparently linked to the lunar phases.
  2. countable, uncountable, of a person or group of people Insanity implying legal irresponsibility.
  3. countable, uncountable Something deeply misguided. Two days have passed since that day of lunacy. What a noise and a fuss and a chattering and an uproar there was! And what a welter of unseemliness and disorder and stupidity and bad manners! And I the cause of it all! Yet part of the scene was also ridiculous—at all events to myself it was so.

Similar: insanity, madness, craziness, craze

Thesaurus

noun

Similar: insanity, madness, craziness, craze

Translations

Every language

noun state of being mad

Españollocura, lunatismo
中文精神病 jīngshénbìng, 神經病 /神经病 shénjīngbìng
Françaisfolie
DeutschVerrücktheit, Wahnsinn
Italianopazzia
Русскийбезу́мие bezúmije, невменя́емость nevmenjájemostʹ, помеша́тельство pomešátelʹstvo, сумасше́ствие sumasšéstvije, умопомеша́тельство umopomešátelʹstvo

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Cite this
MLA

"lunacy." Wiktionary, via Micwyn, micwyn.com/word/lunacy. Accessed 6 Nov. 2026.

APA

lunacy. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/lunacy

Chicago

"lunacy." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/lunacy.

BibTeX
@misc{lunacy_2026,
  title = {lunacy},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/lunacy},
  urldate = {2026-11-06}
}