'Pledged' in the Bible

Lot went out, and spoke to his sons-in-law, who were pledged to marry his daughters, and said, "Get up! Get out of this place, for Yahweh will destroy the city." But he seemed to his sons-in-law to be joking.

"If a man entices a virgin who isn't pledged to be married, and lies with her, he shall surely pay a dowry for her to be his wife.

"'If a man lies carnally with a woman who is a slave girl, pledged to be married to another man, and not ransomed, or given her freedom; they shall be punished. They shall not be put to death, because she was not free.

What man is there who has pledged to be married a wife, and has not taken her? Let him go and return to his house, lest he die in the battle, and another man take her."

If there is a young lady who is a virgin pledged to be married to a husband, and a man find her in the city, and lie with her;

But if the man find the lady who is pledged to be married in the field, and the man force her, and lie with her; then the man only who lay with her shall die:

for he found her in the field, the pledged to be married lady cried, and there was none to save her.

If a man find a lady who is a virgin, who is not pledged to be married, and lay hold on her, and lie with her, and they be found;

David sent messengers to Ishbosheth, Saul's son, saying, "Deliver me my wife Michal, whom I pledged to be married to me for one hundred foreskins of the Philistines."