Meaning & Definition of word "Lunacy"
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Lunacy
/ˈluːnəsi/
noun:
- 1. the state of being a lunatic; insanity.
- Example: His erratic behavior led his family to believe that he was suffering from lunacy.
- 2. deliberately foolish or senseless behavior.
- Example: The decision to invest all their savings in a failing business was sheer lunacy.
- 3. madness or chaotic behavior caused by the phases of the moon (historically considered).
- Example: Some people still believe that certain crimes are influenced by lunacy tied to the full moon.
Etymology
The term 'lunacy' comes from the Latin 'lunaticus', meaning 'moonstruck', reflecting the historical belief that the moon could influence mental states.
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.
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.