irrational number
noun Mathematics.
a number that cannot be exactly expressed as a ratio of two integers.
Origin of irrational number
First recorded in 1545–55
Words nearby irrational number
irradiant,
irradiate,
irradiation,
irradicable,
irrational,
irrational number,
irrationalism,
irrationality,
irrationalize,
irrawaddy,
irreal
British Dictionary definitions for irrational number
irrational number
noun
any real number that cannot be expressed as the ratio of two integers, such as π
Scientific definitions for irrational number
irrational number
[ ĭ-răsh′ə-nəl ]
A number that cannot be expressed as a ratio between two integers and is not an imaginary number. 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.
Cultural definitions for irrational number
notes for irrational number
The
square roots of most whole numbers are irrational numbers.