Main entry: irrational
Definition: not consistent with or using reason
Usage: irrational fears; irrational animals
Antonyms: rational
Definition: consistent with or based on or using reason
Antonyms: sighted
Definition: able to see
Main entry: irrational
Definition: real but not expressible as the quotient of two integers
Usage: irrational numbers
Antonyms: rational
Definition: capable of being expressed as a quotient of integers