sine qua non Hear it!

sine qua non definition

sine qua non (sī′nē kwā nän′, sin′ā kwä nōn′)

an essential condition, qualification, etc.; indispensable thing; absolute prerequisite

Etymology: L, without which not

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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