/ Dictionary / Index S sincere: Meaning and Definition of Find definitions for: sin•cere Pronunciation: (sin-sēr'), [key] — -cer•er, -cer•est. free of deceit, hypocrisy, or falseness; earnest: a sincere apology. genuine; real: a sincere effort to improve; a sincere friend. pure; unmixed; unadulterated. sound; unimpaired. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sincere (Thesaurus) since sincerity Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language