irrational
adjective
1. not consistent with or using reason
- irrational fears
- irrational animals
Similar word(s): incoherent, illogical, unlogical, blind, unreasoning, reasonless, nonrational, superstitious, unreasonable
2. (in mathematics) Of a real number, that cannot be written as the ratio of two integers.
- irrational numbers
Sentences with irrational as an adjective:
- an irrational decision
- The number π is irrational.