The Collaborative International Dictionary of English v.0.48:
Heartache \Heart"ache`\ (-[=a]k`), n. [Cf. AS. heortece.] Sorrow; anguish of mind; mental pang. --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
heartache n 1: intense sorrow caused by loss of a loved one (especially by death) [syn: grief, heartache, heartbreak, brokenheartedness]