sane

Etymology

Learned borrowing from Latin sānus (“healthy; sane”). Doublet of sound.

adj

  1. Being in a healthy condition; not deranged; thinking rationally.
    a sane mind
  2. 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. 2008, BioWare, Mass Effect (Science Fiction), Redwood City: Electronic Arts, →OCLC, PC, scene: Eden Prime
  3. Rational; reasonable; sensible.
    Try to go to bed at a sane time before your exams.

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