Synonyms for irrational
ɪˈræʃ ə nlir·ra·tional

WiktionaryRate these synonyms:0.0 / 0 votes

1. irrationaladjective

   Antonyms:
   rational

English Synonyms and AntonymsRate these synonyms:0.0 / 0 votes

1. irrational

   That is absurd which is contrary to the first principles of reasoning; as, that a part should be greater than the whole is absurd. A paradoxical statement appears at first thought contradictory or absurd, while it may be really true. Anything is irrational when clearly contrary to sound reason, foolish when contrary to practical good sense, silly when petty and contemptible in its folly, erroneous when containing error that vitiates the result, unreasonable when there seems a perverse bias or an intent to go wrong. Monstrous and preposterous refer to what is overwhelmingly absurd; as, "O monstrous! eleven buckram men grown out of two," Shakespeare 1 King Henry IV, act ii, sc. 4. The ridiculous or the nonsensical is worthy only to be laughed at. The lunatic's claim to be a king is ridiculous; the Mother Goose rimes are nonsensical. Compare INCONGRUOUS.

   Synonyms:
   absurd, anomalous, chimerical, erroneous, false, foolish, ill-advised, ill-considered, ill-judged, inconclusive, incorrect, infatuated, ludicrous, mistaken, monstrous, nonsensical, paradoxical, preposterous, ridiculous, senseless, stupid, unreasonable, wild

   Antonyms:
   certain, consistent, demonstrable, demonstrated, established, incontestable, incontrovertible, indisputable, indubitable, infallible, logical, rational, reasonable, sagacious, sensible, sound, substantial, true, undeniable, unquestionable, wise

Princeton's WordNetRate this synonym:0.0 / 0 votes

1. irrational number, irrationaladjective

   a real number that cannot be expressed as a rational number

   Synonyms:
   irrational number

   Antonyms:
   lucid, rational, intelligent, thinking(a), sane, demythologized, reasonable, demythologised, reasoning(a), logical, coherent

2. irrationaladjective

   not consistent with or using reason

   "irrational fears"; "irrational animals"

   Antonyms:
   rational, coherent, reasonable, thinking(a), lucid, demythologized, demythologised, sane, intelligent, logical, reasoning(a)

3. irrationaladjective

   real but not expressible as the quotient of two integers

   "irrational numbers"

   Antonyms:
   rational, sane, coherent, logical, lucid, reasonable, thinking(a), intelligent, demythologized, demythologised, reasoning(a)

Matched Categories

1. • Math

Dictionary of English SynonymesRate these synonyms:5.0 / 1 vote

1. irrationaladjective

   Synonyms:
   brutish, brute, void of reason, without reason

2. irrationaladjective

   Synonyms:
   absurd, unreasonable, preposterous, foolish, silly, unwise, injudicious, extravagant

PPDB, the paraphrase databaseRate these paraphrases:0.0 / 0 votes

1. List of paraphrases for "irrational":

   unreasonable, absurd, illogical, senseless, unreasonably, mindless, unsound

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How to use irrational in a sentence?

1. George Jean Nathan:

   Great art is as irrational as great music. It is mad with its own loveliness.

2. Beau Biden:

   This can not go on. It's a deconstruction of a democratic system, the words of a president matter -- even a lousy president. It gives encouragement to people who are spouting irrational views.

3. The US:

   This is a step that rationalizes what was essentially an irrational arrangement that we inherited, it was irrational because it created unnecessary and elevated risk to The US forces as they moved in and out of the country on a rotational basis, and it gave us less pay-off for incurring that risk because it disrupted their efficacy and consistency of their work with partners.

4. Brianna Glenn:

   I have people going to London next month, and they ’ll come to me and ask me about cancelling, and what are the risks. I ’ll discuss it with them, but we have to be realistic and understanding that safety ca n’t be accurately predicted. We have to be sensible about risks, but I don’t want them to cheat themselves and live inside a safety bubble. One of the biggest terrorist attacks in London occurred July 7, 2005. Sometimes referred to as 7/7, the series of synchronized terroristsuicide bombings in the central city targeted civilians usingthe public transport systemduring rush hour. But more recently, France -- another major destination for American tourists -- has been hit hard by a series of devastating attacks. After the 2016 attacks in Nice, France, Brianna Glenn said she had one cancellation -- but that client wasn't even traveling to France. Sometimes it’s irrational, Glenn admitted but still, she recommends that all travelers purchase travel insurance for big trips. I’ve had people change routes of flights to avoid certain airports. Wednesday’s tragic event took place in one of London’s most populated areas, near Parliament Square. Steve Born, vice president of marketing for the Globus Family of Brands, told Fox News that across Steve Born company they currently have 69 guests in London, and all are accounted for in their home base hotels. A few guests are staying near the location of the attack.

5. Steven Nissen:

   In fact, many physicians consider the new [2013] guidelines to be irrational.