Definition of sine qua non in English:

sine qua non

Line breaks: sine qua non
Pronunciation: /ˌsɪni kwɑː ˈnəʊn
, ˌsʌɪni kweɪ ˈnɒn/


An essential condition; a thing that is absolutely necessary: grammar and usage are the sine qua non of language teaching and learning
More example sentences
  • The study subjects obviously are the sine qua nons of a clinical trial.
  • Adopt these strategies for putting the sine qua non of job search success - networking - to the test.
  • Clearly the first of two sine qua nons is to be able to express one calculated column in terms of another.


Latin, literally '(cause) without which not'.

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