Meaning of the word irrational in English

What does irrational mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

irrational

US /ɪˈræʃ.ən.əl/
UK /ɪˈræʃ.ən.əl/

Adjective

1.

not using reason or clear thinking:

Example:
It's totally irrational, but I'm frightened of mice.
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