raison d'être

American  

[rey-zohn de-truh, re-zawn de-tr^uh] / ˈreɪ zoʊn ˈdɛ trə, rɛ zɔ̃ ˈdɛ trə /

noun

raisons d'être plural

1. reason or justification for being or existence.

   Art is the artist's raison d'être.

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raison d'être British  

/ rɛzɔ̃ dɛtrə /

noun

1. reason or justification for existence

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raison d'être Cultural  

1. A basic, essential purpose; a reason to exist: “Professor Naylor argues that in the nuclear age, infantry forces have lost their raison d'être.” From French, meaning “reason for being.”

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Other Word Forms

Noun Inflected Forms

• raisons d'être
  plural

Etymology

Origin of raison d'être

Borrowed into English from French around 1865–70

Example Sentences

It is also working to build the type of cutting-edge AI agents that some investors think threaten its entire raison d’être.

From The Wall Street Journal • Feb. 12, 2026

The problem isn’t the production but the musical’s shifting raison d’être.

From Los Angeles Times • Nov. 9, 2025

Unrestrained power, of course, is the president’s raison d’être.

From Salon • Sep. 27, 2025

Fundamentally, the format's raison d'être is now under question.

From BBC • Jul. 18, 2025

Obviously, this must find its immediate raison d'être in something other than the meaning that is gone or the meaning that is not yet here.

From Creative Intelligence Essays in the Pragmatic Attitude by Bode, Boyd H.