Definitions

1. noun

a person, especially a girl or woman, who is loved or cherished; a beloved or sweetheart.

“She’s my sweetheart and I love her to bits.”

2. interjection

used to express affection or endearment

“Sweetheart, how are you?”

3. adjective

relating to or characteristic of a sweetheart

“It was a lovely sweetheart gift he gave her.”

4. verb

to address or refer to someone affectionately

“He sweethearted her throughout the whole conversation.”