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View synonyms for irrationally

irrationally

[ ih-rash-uh-nl-ee, -rash-nl- ]

adverb

  1. in a way that is contrary to reason or is not sensible; illogically:

    In firing a highly competent CEO without cause, the Board acted unlawfully, unreasonably, and irrationally.

    Stick to your simple calculation and logic, even when markets are behaving irrationally.

  2. in a way that is driven by impulse or instinct rather than reason; without having or being able to use the faculty of reason:

    When a reporter started poking around, the suspect began acting irrationally and took off like a wild animal.

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Other Words From

  • non·ir·ra·tion·al·ly adverb

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Word History and Origins

Origin of irrationally1

First recorded in 1640–50; irrational ( def ) + -ly ( def )

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