Sane \Sane\, a. [L. sanus; cf. Gr. ?, ?, safe, sound. Cf. {Sound}, a.] 1. Being in a healthy condition; not deranged; acting rationally; -- said of the mind. [1913 Webster] 2. Mentally sound; possessing a rational mind; having the mental faculties in such condition as to be able to anticipate and judge of the effect of one's actions in an ordinary maner; -- said of persons. [1913 Webster] Syn: Sound; healthy; underanged; unbroken. [1913 Webster]