|Noah Webster's Dictionary|
(n.) Engagement for marriage; betrothing, or the fact of being betrothed; a mutual promise, engagement, or contract for a future marriage between the persons betrothed; betrothment; affiance.
Betrothal (1 Occurrence)
Matthew 1:19 But Joseph her husband, being a kind-hearted man and unwilling publicly to disgrace her, had determined to release her privately from the betrothal. (WEY)