lunacy meaning

Noun: lunacy  loonusee

1. Obsolete term for legal insanity
   - madness, insaneness 
2. Foolish or senseless behaviour
   - folly, foolery, tomfoolery, craziness, indulgence

Derived forms: lunacies

See also: lunatic

Type of: caper, frolic, gambol, insanity, play, romp

Encyclopedia: Lunacy

[Medicine]
n pl -cies : any of various forms of insanity: as
a : intermittent insanity once believed to be related to phases of the moon
b : insanity amounting to lack of capacity or of responsibility in the eyes of the law

Examples

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1. what you're doing here is sheer lunacy.
2. but all this was essentially dreamy lunacy.
3. o'brien had tortured him to the edge of lunacy.
4. this is sheer cock-eyed lunacy, absolute lunacy.
5. these were the titles under which these lunacies occurred.