Nearby Words

sine qua non

[sahy-nee kwey non, kwah, sin-ey; Lat. si-ne kwah-nohn] Origin

si·ne qua non

[sahy-nee kwey non, kwah, sin-ey; Lat. si-ne kwah-nohn]
noun
an indispensable condition, element, or factor; something essential: Her presence was the sine qua non of every social event.

Origin:
< Late Latin sine quā (causā) nōn without which (thing) not
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sine qua non is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
sine qua non (ˈsaɪnɪ kweɪ ˈnɒn)
 
n
an essential condition or requirement
 
[literally: without which not]

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

sine qua non
"an indispensible condition," c.1600, from L., lit. "without which not," from sine "without" + qua ablative fem. sing. of qui "which" + non "not." Fem. to agree with implied causa. The L. phrase is common in Scholastic use. Sometimes a masc. form, sine quo non, is used when a person is intended. Proper
EXPAND
plural is sine quibus non.
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary
sine qua non [(sin-i kwah non, nohn)]

The essential, crucial, or indispensable ingredient without which something would be impossible: “Her leadership was the sine qua non of the organization's success.” From Latin, meaning “without which nothing.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
American Heritage
Idioms & Phrases

sine qua non

An essential element or condition, as in A perfect cake is the since qua non of a birthday party. This phrase is Latin for "without which not" and has been used in English since about 1600. It appears more in writing than in speech.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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