Pledged to marry
A person to whom one is engaged to be married
The father and mother came into the room and gave the betrothed couple their blessing.
I was betrothed when I was sixteen to another servant.
He hoped Billy and his betrothed had something.
On the following day Henry was betrothed to Jane Seymour.
And here he was sitting by her side as her betrothed, seeing, hearing, feeling her nearness, her breathing, her movements, her beauty.