rationalization

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun the cognitive process of making something seem consistent with or based on reason
noun (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening
noun (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation

First attested in 1831. From French rationalisation, equivalent to rational + -ization or rationalize + -ation.

But it was a rationalization without substance. — Space Station 1, Frank Belknap Long
In time I demolished every wall of rationalization and subconscious reservation behind which the human personality generally shields itself. — Autobiography of a Yogi, Paramahansa Yogananda
The Spook felt emasculated as he sought a rationalization that would allow him to retain a shred of digni- ty. — Terminal Compromise, Winn Schwartau

rationalisation

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