a wedding dress neckline that resembles the top half of a heart.

This charming style looks like it sounds...a modest, heart-shaped opening in the front of the bodice.

a chicken heart baked in molasses

"Sweetheart" is a song written by Rainy Davis and Peter Kessler and recorded by Davis. The song's protagonist identifies his/her "sweetheart", and explores how they achieve a storybook romance. It was later covered by Jermaine Dupri and Mariah Carey.

A lover of mistress.

Sweetheart is a company in North America that makes cups of a number of kinds. It has 3 product lines: foodservice, packaging, and consumer. On March 1, 2004, Sweetheart was acquired by the Solo Cup Company.

Sorority member or other woman chosen to serve as sweetheart of a fraternity, usually chosen because of work she's done with the fraternity.

a very attractive or seductive looking woman

privileged treatment of a favored person or corporation (sometimes unethically); "another sweetheart deal based on political influence"

a bottle of wine, a wife is a wine bottle

a person loved by another person

any well-liked individual; "he's a sweetheart"