[ seyn ]
/ seɪn /

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 forms

Can be confused

sane Seine

Definition for sane (2 of 2)


[ seyn ]
/ seɪn /


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

British Dictionary definitions for sane


/ (seɪn) /


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

Derived Forms

sanely, 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

Medicine definitions for sane


[ sān ]


Of sound mind; mentally healthy.

Related forms

saneness n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.