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sine qua non

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noun si·ne qua non \ˌsi-ni-ˌkwä-ˈnän, -ˈnōn also ˌsē-; also ˌsī-ni-ˌkwā-ˈnän\

Simple Definition of sine qua non

  • : something that is absolutely needed

Full Definition of sine qua non

plural sine qua nons also sine qui·bus non play \-ˌkwi-(ˌ)bu̇s- also -ˌkwī-\

  1. :  something absolutely indispensable or essential <reliability is a sine qua non for success>

Examples of sine qua non

  1. Patience is a sine qua non for this job.

  2. <an extensive grounding in mathematics is a sine qua non for a career in architecture>



Origin of sine qua non

Late Latin, without which not


First Known Use: 1602


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