SINCERE definition: 1. (of a person, feelings, or behaviour) not pretending or lying; honest: 2. (of a person…. Learn more.
Definition of sincere adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Define sincere. sincere synonyms, sincere pronunciation, sincere translation, English dictionary definition of sincere. adj. sin cer er , sin cer est 1. Not feigned or affected; genuine: sincere indignation. 2. Being without hypocrisy or pretense; true: a sincere friend.