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Meaning & Definition of Lunacy in English

English

Lunacy

Pronunciation:

/ˈluːnəsi/

Part of Speech:

noun

Plural:

lunacies

Meaning and Definition of Lunacy

1. Primary Definition

The state of being mad or insane; foolish behavior.

2. Detailed Definitions

  • Definition: The condition of being mentally ill; insanity.

    Example Sentence: His actions were a clear sign of lunacy, as they defied all rational thought.

  • Definition: Extreme foolishness or irrationality.

    Example Sentence: It was pure lunacy to think they could win without any preparation.

  • Definition: Behavior that is wildly out of control or erratic.

    Example Sentence: The lunacy of the crowd during the event led to chaos.

Etymology

Origin: The term 'lunacy' comes from the Latin 'lunaticus', meaning 'moonstruck', reflecting the historical belief that the moon could influence mental states.

Synonyms

madness | insanity | folly | absurdity

Common Phrases and Expressions

  • lunatic fringe: A group of people whose beliefs or behavior are considered extreme or irrational.
  • lunatic asylum: A historical term for an institution for the care of the mentally ill.

Translations

  • Spanish: lunacía
  • French: lunatique
  • German: Wahnsinn
  • Russian: лунатизм

Related Words

  • lunatic: A person who is considered to be insane.
  • moonstruck: Affected by the moon; dreamy or crazy.

Slang Meanings of lunacy

  • Meaning: Going off the deep end.

    Example Sentence: After hearing the news, she went totally lunacy.

  • Meaning: Out of one's mind.

    Example Sentence: He was acting lunacy after staying awake for three days straight.