Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “illogical”


adjective     /ɪˈlɒdʒ.ɪ.kəl/ US  /-ˈlɑː.dʒɪ-/
not reasonable , wise , or practical , usually because directed by the emotions rather than by careful thought : It is an illogical statement , because if one part is true , then the other must be false .Stupid and sillyOf unsound mindLogic and reason illogically     /-i/ adverb Stupid and sillyOf unsound mindLogic and reason illogicality     /ɪˌlɒdʒ.ɪˈkæl.ɪ.ti/ US  /ɪˌlɑː.dʒɪˈkæl.ə.t̬i/ noun [U] Logic and reason
(Definition of illogical adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of illogical

Definitions of “illogical” in other dictionaries

Word of the Day

best man

a male friend or relation of the bridegroom who stands with him and helps him during a marriage ceremony

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More