Lunacy
[loo-nuh-see] /ˈlu nə si/
noun, plural lunacies.
1.
insanity; mental disorder.
2.
intermittent insanity, formerly believed to be related to phases of the moon.
3.
extreme foolishness or an instance of it:
Her decision to resign was sheer lunacy.
4.
unsoundness of mind sufficient to incapacitate one for civil transactions: a former legal term.
/ˈluːnəsɪ/
noun (pl) -cies
1.
(formerly) any severe mental illness
2.
foolishness or a foolish act
n.
1540s, “condition of being a lunatic,” formed in English from lunatic + -cy. Originally in reference to intermittent periods of insanity, such as were believed to be triggered by the moon’s cycle. The Old English equivalent was monaðseocnes “month-sickness.”
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