English

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Etymology

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From lunatic +‎ -cy.

Pronunciation

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Noun

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lunacy (countable and uncountable, plural lunacies)

  1. (of a person or group of people) The state of being mad, insanity
    1. a cyclical mental disease, apparently linked to the lunar phases
    2. insanity implying legal irresponsibility.
  2. Something deeply misguided.

Synonyms

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Derived terms

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Translations

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