Nearby Words

lunacy

[loo-nuh-see] Example Sentences Origin

lu·na·cy

[loo-nuh-see]
noun, plural -cies.
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.
Law. unsoundness of mind sufficient to incapacitate one for civil transactions.

Origin:
1535–45; lun(atic) + -acy


1. derangement, dementia; craziness, madness, mania, aberration. 3. folly, stupidity.


1, 2. rationality, sanity.

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Lunacy is always a great word to know.
So is malpractice. Does it mean:
a writing or document executed under seal and delivered to effect a conveyance, especially of real estate
failure of a professional person, as a physician or lawyer, to render proper services through reprehensible ignorance or negligence
Example Sentences
  • It's a bracing combination of wit, invention, common sense and lunacy.
  • The first is excellent on the cosmology and physics interface and the second is great at debunking pseudoscience lunacy de jour.
  • Extending into the private sector a policy that has been a disaster in the public sector is lunacy.
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Collins
World English Dictionary
lunacy (ˈluːnəsɪ)
 
n , pl -cies
1.  (formerly) any severe mental illness
2.  foolishness or a foolish act

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source Link To lunacy
Etymonline
Word Origin & History

lunacy
1540s, "condition of being a lunatic," formed in English from lunatic (q.v.). Originally in ref. to intermittent periods of insanity, such as were believed to be triggered by the moon's cycle. The O.E. equivalent was monaðseocnes "month-sickness."
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source Link To lunacy
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