the state of being sane; soundness of mind.
soundness of judgment.

Origin of sanity

1400–50; late Middle English sanite < Latin sānitās. See sane, -ity
Related formsnon·san·i·ty, nounsu·per·san·i·ty, nounun·san·i·ty, noun

Synonyms for sanity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sanity

Contemporary Examples of sanity

Historical Examples of sanity

  • It was Pfeiffer who drew her out of the room and tried to talk reason and sanity to her.


    Mary Roberts Rinehart

  • There ought to be some other word that doesn't accuse his sanity in that degree.

    Questionable Shapes

    William Dean Howells

  • Then you regained your sanity and put him in his rightful place.

    The Monster Men

    Edgar Rice Burroughs

  • Sanity may play with insanity; but insanity must not be allowed to play with sanity.

    Alarms and Discursions

    G. K. Chesterton

  • But if they had, one of them at least would have doubted the young man's sanity.

British Dictionary definitions for sanity



the state of being sane
good sense or soundness of judgment

Word Origin for sanity

C15: from Latin sānitās health, from 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 sanity

early 15c., "healthy condition," from Middle French sanité "health," from Latin sanitatem (nominative sanitas) "health, sanity," from sanus "healthy; sane" (see sane). Meaning "soundness of mind" first attested c.1600.

Online Etymology Dictionary, © 2010 Douglas Harper

sanity in Medicine




The quality or condition of being sane; soundness of mind.
Soundness of judgment or reason.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.