# irrational number

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Related to irrational number: imaginary number

## irrational number

*n.*

A real number that cannot be expressed as a ratio between two integers.

## irrational number

*n*

(Mathematics) any real number that cannot be expressed as the ratio of two integers, such as π

## irra′tional num′ber

*n.*

a number that cannot be exactly expressed as a ratio of two integers.

[1545–55]

## ir·ra·tion·al number

(ĭ-răsh′ə-nəl) A real number that cannot be expressed as a ratio between two integers. If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. Pi and the square root of 2 (√2) are irrational numbers.

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Noun | 1. | irrational number - a real number that cannot be expressed as a rational numberreal, real number - any rational or irrational number transcendental number - an irrational number that is not algebraic algebraic number - root of an algebraic equation with rational coefficients |

Translations

**irrationaaliluku**

**iracionalni broj**

**óræð tala**

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