The Collaborative International Dictionary of English v.0.48:
Heartfelt \Heart"felt`\ (-f[e^]lt`), a. Hearty; sincere. [1913 Webster]WordNet (r) 3.0 (2006):
heartfelt adj 1: earnest; "one's dearest wish"; "devout wishes for their success"; "heartfelt condolences" [syn: dear, devout, earnest, heartfelt]