say it: sin-SER-uh-tee
sincerity is a noun meaning "an earnest and sincere feeling". It carries 4 recorded senses.
an earnest and sincere feeling
the quality of being open and truthful; not deceitful or hypocritical
“his sincerity inspired belief”
“they demanded some proof of my sincerity”
a quality of naturalness and simplicity
“the simple sincerity of folk songs”
the trait of being serious
“a lack of solemnity is not necessarily a lack of seriousness”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for sincerity come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.