婚約
Betrothal \Be*troth"al\, n. The act of betrothing, or the fact of being betrothed; a mutual promise, engagement, or contract for a future marriage between the persons betrothed; betrothment; affiance. ``The feast of betrothal.'' --Longfellow.
betrothal n 1: a mutual promise to marry [syn: {troth}, {engagement}] 2: the act of becoming betrothed or engaged [syn: {espousal}]