Pronunciation: (swēt'härt"), [key]
1. either of a pair of lovers in relation to the other.
2. (sometimes cap.) an affectionate or familiar term of address.
3. a beloved person.
4. Informal.a generous, friendly person.
5. Informal.anything that arouses loyal affection: My old car was a real sweetheart.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.