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.

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

From Salon • Mar. 30, 2026

Even Nvidia Chief Executive Jensen Huang described the idea of AI killing software “the most illogical thing in the world” at a conference last week.

From The Wall Street Journal • Feb. 9, 2026

Elections experts expressed dismay over Johnson’s comments, calling them baseless and illogical.

From Los Angeles Times • Feb. 4, 2026

He called the idea that AI would replace software companies “the most illogical thing in the world, and time will prove itself,” he said.

From MarketWatch • Feb. 4, 2026

I don't want her to think I'm yelling at her, and even if it is completely illogical, I don't want her to be angry with me.

From "Starfish" by Akemi Dawn Bowman

Vocabulary lists containing illogical

Inside Out & Back Again

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

The Devil's Arithmetic

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Way Off: Synonyms for "Wrong"

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!