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Definition of illogical

illogical

/ɪˈlɑː.dʒɪ.kəl/
il · log · i · cal
Adverb:illogically
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illogical Lexical Profile

illogical Game Scores & Validity

• adjective

1

Lacking sense, clear, or sound reasoning; contrary to the rules of logic.

Example

"It is completely illogical to assume that the project will succeed without proper funding and planning."

Synonyms
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Antonyms
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• Rhymes for illogical

• Nearby Words

illiterately
illness
illogic
illogical
illogically
illuminate
illuminated

Word Origin & Etymology

Formed in the late 16th century from the assimilated Latin negative prefix 'il-' ('in-', meaning 'not') and 'logical', ultimately tracing back to the Ancient Greek 'logos', meaning 'word, reason, or principle'.

Cite this Entry

Wordmom. (2026). Definition of Illogical. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/illogical
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