- Sincerity is the quality of being honest, true and real.
An example of sincerity is a person who really means everything that he promises.
sincerity definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the quality or state of being sincere; honesty, genuineness, good faith, etc.
Origin: Middle French sincérité ; from Classical Latin sinceritas
sincerity definition by American Heritage Dictionary
The quality or condition of being sincere; genuineness, honesty, and freedom from duplicity.