n.

1. 心上人，戀人，情人[C]
   She was John's childhood sweetheart.

   她是約翰兒時的心上人。

2. 【口】甜心（用來稱呼心愛的人或家人；女人口語上表示友善的稱呼）
   What can I get you, sweetheart?

   （最常出於女店員或餐館女侍之口）我能為你拿點什麼，甜心？

vi.

1. 戀愛
   Boys of your age ought to be sweethearting.

   你這個年紀的男孩該是求愛的時候了。

vt.

1. 向……求愛；與……戀愛

n.

1. a person that one is in love with.
   ▸used as a term of endearment or affectionate form of address.
2. [as modifier] informal denoting an arrangement reached privately by two sides in their own interests:
   a sweetheart deal.