adjective, san·er, san·est.

free from mental derangement; having a sound, healthy mind: a sane person.
having or showing reason, sound judgment, or good sense: sane advice.
sound; healthy.

Origin of sane

First recorded in 1620–30, sane is from the Latin word sānus healthy
Related formssane·ly, adverbsane·ness, nounnon·sane, adjectivenon·sane·ly, adverbnon·sane·ness, noun
Can be confusedsane Seine

Synonyms for sane

2. reasonable, sensible, judicious, level-headed.




a private nationwide organization in the U.S., established in 1957, that opposes nuclear testing and advocates international peace.

Origin of SANE

official shortening of its by-name Committee for a Sane Nuclear Policy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sane

Contemporary Examples of sane

Historical Examples of sane

  • "They're the only sane folks I've met among your friends," he had told his grandson.

    The Spenders

    Harry Leon Wilson

  • In his sane moments he did not care a fig for anybody's birthday.


    William J. Locke

  • In company with my friend I set off for an al-fresco breakfast on the banks of the Sane.

    The Roof of France

    Matilda Betham-Edwards

  • A sane and sensible wave seemed to be sweeping the whole country.

    Her Father's Daughter

    Gene Stratton-Porter

  • Lunatics, she knew, could be quelled by the calm gaze of the sane human eye.

British Dictionary definitions for sane



sound in mind; free from mental disturbance
having or showing reason, good judgment, or sound sense
obsolete healthy
Derived Formssanely, adverbsaneness, noun

Word Origin for sane

C17: from Latin sānus healthy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sane

1721, back-formation from sanity or else from Latin sanus "sound, healthy," in figurative or transferred use, "of sound mind, rational, sane," also, of style, "correct;" of uncertain origin. Used earlier, of the body, with the sense of "healthy" (1620s). Related: Sanely.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for sane




Of sound mind; mentally healthy.
Related formssaneness n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.