irrational Hear it!

irrational definition

ir·ra·tional (i ras̸h′ə nəl)

adjective

  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 integers: √ and pi are irrational numbers

Etymology: ME < L irrationalis: see in- & rational

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