Definition of "incommensurable" in English

adjective

1. (mathematics, of two real numbers) having a ratio that is not expressible as a fraction of two integers.

   • The side and diagonal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable.

2. (mathematics, of two integers) having no common integer divisor except 1.

3. Not able to be measured by the same standards as another term in the context.

noun

1. An incommensurable value or quantity; an irrational number.