Synonyms of irrational

irrational

adjective

i-ˈra-sh(ə-)nəl 

as in unreasonable

not using or following good reasoning

it's irrational to think that you can continue to consume an excess of calories and not gain weight

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

Examples of irrational in a Sentence

Recent Examples on the Web

The bottom line Markets, for the most part, are irrational creatures. —Yeo Boon Ping, CNBC, 25 Oct. 2024

Is it based on an irrational fear or actual occurrence — or even a stunt gone wrong? —Proma Khosla, IndieWire, 23 Oct. 2024

These irrational behaviors are so predictable that companies have devised clever ways to exploit these tendencies when pricing and packaging goods, creating commercials, stocking shelves, and designing websites and apps. —Claire Therese Hemingway, Discover Magazine, 28 Sep. 2024

There is a rational way of conducting our lives and an irrational way, and most people go about it irrationally. —John Hyatt, Forbes, 18 Oct. 2024