Noun:
1: truelove, steady, sweetie, sweetheart a person loved by another person
2: sweetheart any well-liked individual; "he's a sweetheart"
3: knockout, sweetheart, dish, peach, stunner, ravisher, beauty, smasher, looker, lulu, mantrap a very attractive or seductive looking woman
Adjective:
1: sweetheart, privileged privileged treatment of a favored person or corporation (sometimes unethically); "another sweetheart deal based on political influence"