The quality or condition of being sane; soundness of mind.(noun)
Soundness of judgment or reason.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "sanity" in a sentence
"Maybe it seems silly, but if your life or your sanity is at risk, it's not a bad idea."
"Now when he was misusing his authority to browbeat me into what he termed sanity, I found comfort in recalling that after all he had once in a moment of forgetfulness confessed to having a home at Mentone Park, with a wife and four daughters of whose accomplishments he spoke almost with boasting."
"And that unknown means Owen is facing her new pregnancy with as much fear as joy, repeating what she calls sanity sonograms for reassurance that this baby's still fine."