Definition of: sincere

(sin·sir′) adjective
1. Being in reality as it is in appearance; real; genuine: sincere regret.
2. Intending precisely what one says or what one appears to intend; free from hypocrisy; honest in one's action or profession: a sincere friend.
3. Obs. Being without admixture; free; pure.
4. Obs. Blameless.
5. Obs. Sound; whole. See synonyms under CANDID, HONEST. [<L sincerus uncorrupted <sin- without + stem of caries decay]
—sin·cere′ly adverb