sane

Being in a healthy condition; not deranged; thinking rationally.

a sane mind

Mentally sound; possessing a rational mind; having the mental faculties in such condition as to be able to anticipate and judge the effect of one's actions in an ordinary manner.

a sane person

Shepard: What's wrong with your assistant? Dr. Warren: Manuel has a brilliant mind, but he's always been a bit... unstable. Genius and madness are two sides of the same coin. Dr. Manuel: Is it madness to see the future? To see the destruction rushing towards us? To understand there is no escape? No hope? No, I am not mad. I'm the only sane one left! Dr. Warren: I gave him an extra dose of his meds after the attack.

Rational; reasonable; sensible.

Try to go to bed at a sane time before your exams.

Initialism of sexual assault nurse examiner.

Ellipsis of SANE disc, a type of black hole accretion disc.

Acronym of standard and normal evolution.