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Added 10 October 2026

lunacy

/ˈluː.nə.si/ noun

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noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about lunacy at Wordnik → Where our words come from →

  1. The state of being mad, insanity A cyclical mental disease, apparently linked to the lunar phases. Insanity implying legal irresponsibility.
  2. A cyclical mental disease, apparently linked to the lunar phases.
  3. Insanity implying legal irresponsibility.

Origin

From lun(atic) + -acy.

From Wiktionary, via Kaikki.org (CC BY-SA)

Related Words: insanenessmadnessdementedinsanitycrazycrazinessinsanecrazefrenzyfoolishnessfoolishfolly

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