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Meaning of IRRATIONAL

Pronunciation:  i'rashunl

 
WordNet Dictionary
 
 Definition: 
  1. [adj]  not consistent with or using reason; "irrational fears"; "irrational animals"
  2. [adj]  (math) real but not expressible as the quotient of two integers; "irrational numbers"
 

IRRATIONAL is a 10 letter word that starts with I.

 

 Synonyms: blind, incoherent, jaundiced, nonrational, reasonless, superstitious, unreasoning, yellow
 
 Antonyms: rational, rational
 
 See Also: illogical, unlogical, unreasonable

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Ir*ra"tion*al\, a. [L. irrationalis: cf. F.
irrationnel. See {In-} not, and {Rational}.]
1. Not rational; void of reason or understanding; as, brutes
   are irrational animals.

2. Not according to reason; absurd; foolish.

         It seemed utterly irrational any longer to maintain
         it.                                   --I. Taylor.

3. (Math.) Not capable of being exactly expressed by an
   integral number, or by a vulgar fraction; surd; -- said
   especially of roots. See {Surd}.

Syn: Absurd; foolish; preposterous; unreasonable; senseless.
     See {Absurd}.

 
Thesaurus Terms
 
 Related Terms: abnormal, absonant, algorismic, algorithmic, aliquot, bereft of reason, bigoted, brainless, brainsick, cardinal, contradictory, contrary to reason, crackbrained, cracked, crazed, crazy, daft, decimal, deluded, demented, deprived of reason, deranged, differential, digital, disoriented, distraught, even, exponential, extravagant, extreme, extremist, fallacious, fanatic, faulty, figural, figurate, figurative, finite, flawed, flighty, foolish, fractional, haggard, hallucinated, headless, ignorant, ill-advised, ill-considered, ill-contrived, ill-devised, ill-gauged, ill-judged, illogical, imaginary, impair, impolitic, impossible, imprudent, inadvisable, inauthentic, inconclusive, incongruous, inconsequent, inconsequential, inconsiderate, inconsistent, indiscreet, inept, inexpedient, infinite, injudicious, inordinate, insane, insensate, integral, invalid, lackbrained, lean-minded, lean-witted, loco, logarithmic, logometric, loose, lunatic, mad, maddened, manic, mazed, mental, mentally deficient, meshuggah, mindless, misadvised, misguided, moon-struck, myopic, negative, non compos, non compos mentis, nonrational, nonscientific, not all there, not bright, not following, not right, numeral, numerary, numerative, numeric, odd, of little brain, of unsound mind, off, ordinal, overenthusiastic, overreligious, overzealous, pair, paralogical, pea-brained, perfervid, pin-brained, positive, possible, prime, psycho, queer, rabid, radical, rational, real, reasonless, reciprocal, reckless, self-annulling, self-contradictory, self-refuting, senseless, shortsighted, sick, slackminded, slackwitted, sophistic, stark-mad, stark-staring mad, strange, submultiple, surd, tetched, thoughtless, touched, transcendental, ultrazealous, unadvised, unauthentic, unbalanced, unconnected, unconsidered, undiscerning, unforeseeing, ungifted, unhinged, unintellectual, unintelligent, unphilosophical, unreasonable, unreasoning, unreflecting, unreflective, unsane, unscientific, unseeing, unsensible, unsettled, unsound, untalented, unthinking, unthoughtful, unwise, wandering, wild-eyed, wild-looking, without reason, witless, zealotic
 

 

 

 

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