'Sincerely' definitions:

Definition of 'sincerely'

From: WordNet
adverb
With sincerity; without pretense; "she praised him sincerely for his victory"; "was unfeignedly glad to see his old teacher"; "we are truly sorry for the inconvenience" [syn: sincerely, unfeignedly, truly] [ant: insincerely]
adverb
Written formula for ending a letter [syn: sincerely, sincerely yours]

Definition of 'Sincerely'

From: GCIDE
  • Sincerely \Sin*cere"ly\, adv. In a sincere manner. Specifically: (a) Purely; without alloy. --Milton. (b) Honestly; unfeignedly; without dissimulation; as, to speak one's mind sincerely; to love virtue sincerely. [1913 Webster]