Synonyms and related words:
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

Moby Thesaurus. . 1996.


Look at other dictionaries:

  • Irrational — may refer to: *Irrationality *Irrational rhythm, *Irrational exuberance *Irrational GamesIn mathematics: *Irrational number *Proof that e is irrational *Proof that pi; is irrational *Quadratic irrational *List of integrals of irrational… …   Wikipedia

  • irrational — irrational, unreasonable are comparable when meaning not governed or guided by reason. Both terms have been used occasionally in the sense of not having the power to reason {nothing has a greater effect on all plants and irrational animals Hume}… …   New Dictionary of Synonyms

  • irrational — ir·ra·tio·nal /ir ra shə nəl/ adj: not rational: as a: not governed by reason, mental clarity, or understanding b: not governed by a fair consideration of facts or evidence; broadly: arbitrary an irrational decision to deny the permit… …   Law dictionary

  • irrational — [i rash′ə nəl] adj. [ME < L irrationalis: see IN 2 & RATIONAL] 1. lacking the power to reason 2. contrary to reason; senseless; unreasonable; absurd 3. Math. designating a real number not expressible as an integer or as a quotient of two… …   English World dictionary

  • irrational — ir*ra tion*al ([i^]r*r[a^]sh [u^]n*al), a. [L. irrationalis: cf. F. irrationnel. See {In } not, and {Rational}.] [1913 Webster] 1. Not rational; void of reason or understanding; as, brutes are irrational animals. [1913 Webster] 2. Not according… …   The Collaborative International Dictionary of English

  • irrational — Adj. (Mittelstufe) nicht von der Vernunft geleitet, unvernünftig Beispiel: Die Situation wirkt ziemlich irrational. Kollokation: sich irrational verhalten …   Extremes Deutsch

  • Irrational — (v. lat., fr. Irraisonabel), 1) vernunftwidrig; 2) unüberlegt; 3) (Math.), ein Verhältnißbegriff für Größen, deren eine nicht aus Theilen der anderen zusammengesetzt werden kann, z.B. die Diagonale eines Quadrats od. Cubus in Beziehung auf deren… …   Pierer's Universal-Lexikon

  • Irrationāl — (lat., irrationell), vernunftwidrig, unvernünftig; in der Mathematik Bezeichnung für eine Zahl, die zur Einheit inkommensurabel ist (s. Größe, S. 421), deren Wert man daher nicht völlig genau, sondern nur annähernd (durch einen unendlichen, nicht …   Meyers Großes Konversations-Lexikon

  • Irrational — Irrational, Bezeichnung für mehrdeutige algebraische Funktionen …   Lexikon der gesamten Technik

  • Irrational — Irrationāl (lat.), vernunftwidrig; in der Mathematik Bezeichnung von Zahlgrößen, die sich nicht durch ganze Zahlen oder Brüche, sondern nur annähernd (durch unendliche Dezimalbrüche) ausdrücken lassen, wie z.B. die Wurzel ganzer Zahlen, die nicht …   Kleines Konversations-Lexikon

  • Irrational — Irrational, lat. deutsch, vernunftwidrig; I.ismus, I.ität, Vernunftwidrigkeit. In der Mathematik heißen diejenigen Größen i.e, welche in ihren Theilen nicht durch einander zusammengesetzt werden können; bei den Zahlen diejenigen, welche sich… …   Herders Conversations-Lexikon