Irrational definition

ĭ-răshə-nəl
Affected by loss of usual or normal mental clarity; incoherent, as from shock.
adjective
8
4
Marked by a lack of accord with reason or sound judgment.

An irrational dislike.

adjective
5
2
Irrational is defined as lacking reason or understanding.

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

adjective
3
1
Not rational; unfounded or nonsensical.

An irrational decision.

adjective
3
1
(mathematics) Of or relating to an irrational number.
adjective
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0
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Not endowed with reason.
adjective
2
0
Not endowed with reason.
adjective
5
4
Being a metric foot containing such a syllable.
adjective
2
1
Affected by loss of usual or normal mental clarity; incoherent, as from shock.
adjective
1
0
Marked by a lack of accord with reason or sound judgment.

An irrational dislike.

adjective
1
0
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Being a syllable in Greek and Latin prosody whose length does not fit the metric pattern.
adjective
1
0
(mathematics): transcendental.
hyponyms
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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.

noun
2
2
(math.) Designating a real number not expressible as an integer or as a quotient of two integers: √3 and pi are irrational numbers.
adjective
1
1
(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.

adjective
1
1
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A real number that can not be expressed as the quotient of two integers, an irrational number.
noun
1
1
Lacking the power to reason.
adjective
3
4
Contrary to reason or rationality; senseless; unreasonable; absurd.
adjective
3
4
An irrational number.
noun
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2

Other Word Forms

Noun

Singular:
irrational
Plural:
irrationals

Origin of irrational

  • From Latin irratiōnālis, from ir- + ratiōnālis.

    From Wiktionary