Definition of Irrational
Irrational
Ir·ra·tion·al


Definition/Meaning
(adjective)
Not based on reason or sound judgment; unreasonable or illogical.

e.g. The company's irrational decision to invest in the failing project led to financial losses.

(adjective)
(of mathematics) a number that is cannot be expressed as a ratio of two integers, and has an infinite and non-recurring expansion in the decimal form;

e.g. An example of an irrational number is the square root of 2.



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