Irrational and Informed

Opposite meaning words

Irrational adjective - Not using or following good reasoning.

Usage example: it's irrational to think that you can continue to consume an excess of calories and not gain weight

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Informed is an antonym for irrational.

Informed adjective - Based on sound reasoning or information.

Usage example: the expert's informed opinion persuaded many fence-sitters to get a flu shot

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Irrational is an antonym for informed.

Cite this Source

Informed and Irrational. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/irrational/informed

Irrational & Informed. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/irrational/informed>.

Informed or Irrational. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/irrational/informed.

Google Ngram Viewer shows how "irrational" and "informed" have occurred on timeline