Antonyms 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.

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

   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

Matched Categories

1. • Math

Princeton's WordNetRate this antonym:0.0 / 0 votes

1. irrational number, irrationaladjective

   a real number that cannot be expressed as a rational number

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

   Synonyms:
   irrational number

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)

How to use irrational in a sentence?

1. 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.

2. Liu Bo:

   O2O is an irrational market, there are too many subsidies. It's becoming more expensive to get new customers.

3. Dick Cheney:

   We are confronting a domestic threat that we have never faced before -- and that is a former President who is attempting to unravel the foundations of our constitutional Republic, and he is aided by Republican leaders and elected officials who have made themselves willing hostages to this dangerous and irrational man.

4. Marc Siegel:

   Support from Rio would send a much more powerful message and help fight the irrational fear of the Zika virus which is growing much faster than the actual risk is, if you are a celebrity - Unless you are pregnant, about to become pregnant, or have a partner who is, there is absolutely no reason not to go.

5. Foreign Ministry spokeswoman Hua Chunying:

   We express dissatisfaction and opposition towards the U.S. side's report's irrational exaggerations of China's threat, we have already clearly explained our stance on the issue of construction on islands and reefs in the South China Sea several times.

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