American English

Definition of sine qua non noun from the Oxford Advanced American Dictionary


sine qua non

NAmE//ˌsɪni kwɑ ˈnɑn//
, NAmE//ˌsɪni kwɑˈnoʊn//
[singular] sine qua non (of/for something) (from Latin) (formal)
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something that is essential before you can achieve something else TV coverage is the sine qua non of a sport if it is to thrive. Trust is a sine qua non for any counseling.
See the Oxford Advanced Learner's Dictionary entry: sine qua non