raison d'être

American  

[ray-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

See Examples For:

raison d'être

But it’s the photos, of course, that are the raison d’être of this lavish book.

From The Wall Street Journal ● Sep. 11, 2026

Privacy A VPN’s raison d’être: encrypting your traffic to mask your internet browsing from your ISP and prevent it from throttling your connection.

From Salon ● Jun. 2, 2026

BeReal’s appeal ended the second the app started pushing users to friend randos and post more than once a day, defeating its entire raison d’être.

From Slate ● Dec. 14, 2025

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

From Los Angeles Times ● Nov. 9, 2025

Sit with me, upon its movable platform, and I will give you some peeps at the thing itself, leaving you to discuss after me its raison d'être, its right to be.

From Modern Society by Julia Ward Howe