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Meaning of irrational
The primary meaning of the word "irrational" is related to something that is not based on reason or is contrary to reason.
Etymology of irrational
The word "irrational" has its roots in the Latin words "ir-" (meaning "not") and "rationalis" (meaning "of or pertaining to reason"), with the suffix "-al" forming an adjective, and it entered the English language in the 15th century to describe something that is not based on reason.
Synonyms
illogical
unreasonable
absurd
ridiculous
senseless
foolish
imprudent
unwise
impulsive
emotional
instinctive
intuitive
unreasoning
arbitrary
capricious
whimsical
fanciful
irrationalistic
nonsensical
preposterous
incongruous
inconsistent
contradictory
paradoxical
illogicality
unreasonableness
absurdity
foolishness
imprudence
unthinkingly
emotionally
impulsively
Definitions
- Not logical or reasonable: an irrational fear of spiders
- Not endowed with reason: irrational animals
- (in mathematics) a number that cannot be expressed as a finite decimal or fraction: irrational numbers
Usage Examples
- The company's decision to lay off employees seemed irrational given the current economic climate.
- She had an irrational fear of heights that prevented her from skydiving.
- The mathematician spent years studying irrational numbers and their properties.
Antonyms
rational
logical
reasonable
sensible
wise
prudent
thoughtful
deliberate
considered
judicious
intelligent
informed
knowledgeable
sagacious
discerning
perceptive
astute
shrewd
clever
lucid
coherent
methodical
systematic