Synonyms of illogical

illogical

adjective

(ˌ)i(l)-ˈlä-ji-kəl 

as in unreasonable

not using or following good reasoning

the illogical claim that playing basketball makes people taller because one sees so many tall players

illogical people are likely to believe every sensational claim made on TV

Synonyms & Similar Words

• unreasonable
• irrational
• unreasoning
• illegitimate
• misleading
• absurd
• unreasoned
• weak
• foolish
• silly
• fallacious
• invalid
• nonrational
• unsound
• inconsequential
• weird
• meaningless
• inconsequent
• inconsistent
• unusual
• odd
• strange
• specious
• misguided
• nonsensical
• sophistic
• asinine
• insane
• random
• surreal
• preposterous
• unconsidered
• inexplicable
• ill-advised
• disorganized
• wacky
• unconvincing
• eristic
• mad
• unexplainable
• disordered
• senseless
• unaccountable
• half-baked
• nutty
• reasonless
• peculiar
• rambling
• Kafkaesque

Antonyms & Near Antonyms

• logical
• reasonable
• rational
• valid
• sound
• sensible
• wise
• sane
• justified
• reasoned
• sober
• enlightened
• just
• plausible
• well-founded
• informed
• well-grounded
• compelling
• commonsense
• clear
• certain
• solid
• persuasive
• credible
• organized
• true
• convincing
• satisfying
• sure
• cogent
• ordered
• demonstrated
• confirmed
• established
• substantiated
• validated
• corroborated

Example Sentences

Recent Examples of illogical

Many professional teams pretzel themselves into illogical positions when putting and keeping players on their rosters. — Troy Renck, Denver Post, 19 May 2026

If that sounds illogical, trainer Chad Brown, who will start Emerging Market in a bid to win his first Derby, can explain. — Assistant Sports Editor, Los Angeles Times, 30 Apr. 2026

Among other things, the illogical alternating of festival years with Moscow came to an end, and since 1994, the festival has been held annually in Karlovy Vary. — Georg Szalai, HollywoodReporter, 21 Apr. 2026

Amid all their attacks and counter-attacks, what motivates each aggrieved party comes to light, painting a rich, empathetic portrait of lives lived under immense pressure — and the illogical outlets that sometimes become our only means of relief. — Ben Travers, IndieWire, 16 Apr. 2026