sine qua non
nounNAmE//ˌsɪni kwɑ ˈnɑn//, NAmE//ˌsɪni kwɑˈnoʊn//
[singular] sine qua non (of/for something) (from Latin) (formal)Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation: sine qua non