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.

Multi-Version Concordance 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)