sanity

noun

san·​i·​ty ˈsa-nə-tē 

: the quality or state of being sane

especially : soundness or health of mind

Synonyms of sanity

• mind

Examples of sanity in a Sentence

People have begun to doubt his sanity.

She is the mother of six children but somehow keeps her sanity.

The sanity of the decision was never in question.

Recent Examples on the Web

The students who never quite fit my sanity check were those focusing on earning points instead of learning first and having the points follow. —Mitch Zimmer, Washington Post, 3 Feb. 2026

That familiarity has long made Boca a magnet for Northerners seeking sun and sanity. —Jason Phillips, USA Today, 31 Jan. 2026

Surprised, the team performed a sanity check—the researchers calculated heritability in the traditional way for twins born between 1900 and 1935, an era when rapid medical advances steadily curtailed premature death. —Cody Cottier, Scientific American, 29 Jan. 2026

Indeed, accepting its finitude is a crucial step toward sanity, freedom, and happiness. —The New Yorker, New Yorker, 28 Jan. 2026

Word History

Etymology

Middle English sanite, from Anglo-French sanité, from Latin sanitat-, sanitas health, sanity, from sanus healthy, sane

First Known Use

15th century, in the meaning defined above

Phrases Containing sanity

• lose one's mind/sanity

Rhymes for sanity

• vanity
• christianity
• inhumanity
• humanity
• inanity
• insanity
• profanity
• urbanity

Kids Definition

sanity

noun

san·​i·​ty ˈsan-ət-ē 

: the quality or state of being sane

Medical Definition

sanity

noun

san·​i·​ty ˈsan-ət-ē 

plural sanities

: the quality or state of being sane

especially : soundness or health of mind

Legal Definition

sanity

noun

san·​i·​ty

: the quality or state of being sane compare insanity