lunatic
[ loo-nuh-tik ]
/ ˈlu nə tɪk /
noun
(no longer in technical use; now considered offensive) an insane person.
a person whose actions and manner are marked by extreme eccentricity or recklessness.
a person legally declared to be of unsound mind and who therefore is not held capable or responsible before the law: a former legal term.
adjective Also lu·nat·i·cal [loo-nat-i-kuhl] /luˈnæt ɪ kəl/ (for defs. 4, 5, 7).
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Origin of lunatic
OTHER WORDS FROM lunatic
lu·nat·i·cal·ly, adverbhalf-lu·na·tic, adjectiveWords nearby lunatic
lunar rover, lunarscape, lunar year, lunate, lunate bone, lunatic, lunatic asylum, lunatic fringe, lunation, lunch, lunchbox
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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British Dictionary definitions for lunatic
lunatic
/ (ˈluːnətɪk) /
adjective Also (rarely): lunatical (luːˈnætɪkəl)
an archaic word for insane
foolish; eccentric; crazy
noun
a person who is insane
Derived forms of lunatic
lunatically, adverbWord Origin for lunatic
C13 (adj) via Old French from Late Latin lūnāticus crazy, moonstruck, from Latin lūna moon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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