irrational meaning and definition

IRRATIONAL noun

Definition of irrational (noun)

1. a real number that cannot be expressed as a rational number
   • synonyms: irrational number

IRRATIONAL adjective

Definition of irrational (adjective)

1. not consistent with or using reason
   • "irrational fears"; "irrational animals"
   • antonym: rational
2. real but not expressible as the quotient of two integers
   • "irrational numbers"
   • antonym: rational