illogical

[ih-loj-i-kuhl] / ɪˈlɒdʒ ɪ kəl /

ADJECTIVE

not making sense

Synonyms

STRONGEST

absurd false groundless implausible inconsistent incorrect irrational irrelevant preposterous senseless unreasonable unscientific untenable

WEAK

casuistic cockeyed fallacious fatuous faulty hollow inconclusive incongruous inconsequent invalid mad meaningless not following nutty off the wall screwy self-contradictory sophistic sophistical specious spurious unconnected unproved unsound unsubstantial wacky without basis without foundation

Antonyms

STRONGEST

correct logical rational reasonable right sensible true wise

WEAK

meaningful

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Although this sequence seems illogical, it is arguably allowed under current accounting rules.

From MarketWatch • Apr. 27, 2026

The idea that a warning should change the legal calculus of excessive force, now at the center of both of these cases, is callous and illogical.

From Slate • Apr. 21, 2026

Educational AI, he told journalist Taylor Lorenz, generated “false information” or “illogical questions, illogical texts.”

From Salon • Mar. 30, 2026

Immigration rights advocates called this claim “perverse” and illogical.

From Los Angeles Times • Mar. 24, 2026

It was largely because of his habit of marching troops all over the Shenandoah Valley in an illogical and inexplicable fashion that Jackson earned a reputation among bewildered enemy officers for wiliness.

From "A Walk in the Woods" by Bill Bryson

Vocabulary lists containing illogical

Inside Out & Back Again

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The Devil's Arithmetic

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Way Off: Synonyms for "Wrong"

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