Main entry: sane
Definition: mentally healthy; free from mental disorder
Usage: appears to be completely sane
Antonyms: insane
Definition: afflicted with or characteristic of mental derangement
Main entry: reasonable, sane
Definition: marked by sound judgment
Usage: sane nuclear policy
Antonyms: irrational
Definition: not consistent with or using reason
Antonyms: irrational
Definition: real but not expressible as the quotient of two integers