B2adjectiveemotions
US/ɪˈræʃ.ən.əl/
UK/ɪˈræʃ.ən.əl/
not based on clear thinking or good reasons
In context
I know it's irrational, but I'm still afraid of flying.
When people are tired, they often make irrational decisions about money.
His anger seemed completely irrational to everyone in the room.
Words that go with irrational
adjective + noun
- irrational fearShe has an irrational fear of spiders.
- irrational behaviorStress and lack of sleep can lead to irrational behavior.
- irrational decisionBuying a car I couldn't afford was an irrational decision.
- irrational beliefTherapy can help you challenge irrational beliefs about yourself.
- irrational numberPi is an irrational number, so its digits never end.
adverb + adjective
- completely irrationalI know the feeling is completely irrational, but I can't stop it.
- totally irrationalPanic buying toilet paper was totally irrational.