Sincerity is the quality of being honest, true and real.
An example of sincerity is a person who really means everything that he promises.
the quality or state of being sincere; honesty, genuineness, good faith, etc.
Origin of sincerityMiddle French sincérité from Classical Latin sinceritas
The quality or condition of being sincere; genuineness, honesty, and freedom from duplicity.
(countable and uncountable, plural sincerities)
From Middle French sincÃ©ritÃ©.