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Antonyms for irrational


Grammar : Adj
Spell : ih-rash-uh-nl
Phonetic Transcription : ɪˈræʃ ə nl



Definition of irrational

Origin :
  • late 15c., "not endowed with reason" (of beats, etc.); earlier (of quantities) "inexpressible in ordinary numbers" (late 14c.); from Latin irrationalis "without reason," from assimilated form of in- "not, opposite of" (see in- (1)) + rationalis "reason" (see rational). Meaning "illogical, absurd" is attested from 1640s. Related: Irrationally.
  • adj illogical, senseless
Example sentences :
  • I haven't been irrational, I give you my word, not once since I came here.
  • Extract from : « The Spenders » by Harry Leon Wilson
  • This reply seemed to arouse an irrational anger in the Briton.
  • Extract from : « The Cruise of the Dry Dock » by T. S. Stribling
  • If men cannot have a rational belief, they will have an irrational.
  • Extract from : « Laws » by Plato
  • Pride was irrational, and so was the greater part of human misery.
  • Extract from : « Mezzerow Loves Company » by Floyd L. Wallace
  • In spite of his fine manner and bearing, his every word had been irrational.
  • Extract from : « Elsie Marley, Honey » by Joslyn Gray
  • The science of healing will become no chance and irrational thing.
  • Extract from : « The Untroubled Mind » by Herbert J. Hall
  • What makes you call the blessed quart an irrational quantity?
  • Extract from : « Stories of Comedy » by Various
  • It seemed to me that he was foolish and irrational, altogether unlike himself.
  • Extract from : « Paul Patoff » by F. Marion Crawford
  • Bright's courage was almost as irrational as that of the rebels themselves.
  • Extract from : « The Education of Henry Adams » by Henry Adams
  • It was not a controlled anger, but had something of the irrational in it.
  • Extract from : « Rebels of the Red Planet » by Charles Louis Fontenay

Synonyms for irrational

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019