Irrational (noun) Definition, Meaning & Examples

adjective
  1. without the faculty of reason; deprived of reason.
  2. without or deprived of normal mental clarity or sound judgment.
  3. not in accordance with reason; utterly illogical: irrational arguments.
  4. not endowed with the faculty of reason: irrational animals.
  5. Mathematics.
    • (of a number) not capable of being expressed exactly as a ratio of two integers.
    • (of a function) not capable of being expressed exactly as a ratio of two polynomials.
  6. (of an equation) having an unknown under a radical sign or, alternately, with a fractional exponent.
  7. Greek and Latin Prosody.
    • of or relating to a substitution in the normal metrical pattern, especially a long syllable for a short one.
    • noting a foot or meter containing such a substitution.
noun
  1. irrational number.
adjective
  1. inconsistent with reason or logic; illogical; absurd
  2. incapable of reasoning
  3. maths
    • not rational
    • (as noun)
  4. prosody (in Greek or Latin verse)
    • of or relating to a metrical irregularity, usually the occurrence of a long syllable instead of a short one
    • denoting a metrical foot where such an irregularity occurs
Irrational (noun) Definition, Meaning & Examples

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