Irrational meaning

ĭ-răshə-nəl
Irrational is defined as lacking reason or understanding.

An example of irrational is a fear of a certain color.

adjective
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Affected by loss of usual or normal mental clarity; incoherent, as from shock.
adjective
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Not endowed with reason.
adjective
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Marked by a lack of accord with reason or sound judgment.

An irrational dislike.

adjective
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(mathematics) Of or relating to an irrational number.
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Lacking the power to reason.
adjective
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Contrary to reason or rationality; senseless; unreasonable; absurd.
adjective
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(math.) Designating a real number not expressible as an integer or as a quotient of two integers: √3 and pi are irrational numbers.
adjective
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Not rational; unfounded or nonsensical.

An irrational decision.

adjective
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(mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.

The number π is irrational.

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(mathematics): transcendental.
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A real number that can not be expressed as the quotient of two integers, an irrational number.
noun
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The definition of an irrational is a number that cannot be expressed as a fraction.

An example of irrational is pi.

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An irrational number.
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Origin of irrational

  • From Latin irratiōnālis, from ir- + ratiōnālis.

    From Wiktionary