"irrational number." YourDictionary, n.d. Web. 05 December 2018. <https://www.yourdictionary.com/irrational-number>.
irrational number. (n.d.). Retrieved December 05th, 2018, from https://www.yourdictionary.com/irrational-number
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.