In Western tradition, an engagement ring is a ring worn by a woman indicating her engagement to be married. Conventionally, the ring is presented as a betrothal gift by a man to his prospective spouse while he proposes marriage or directly after she accepts his marriage proposal. It represents a formal agreement to future marriage.
In the United States and Canada today it is becoming more common, but still rare, that a woman will also buy her partner an engagement ring at the time of the engagement. These may be called male engagement rings or mengagement rings, which is a portmanteau of "man" and "engagement ring".
如今，在美国和加拿大，女方也开始流行在订婚时给男方送订婚戒指，不过，这种现象目前还不是太普遍。这种女方送给男方的订婚戒指叫做男士订婚戒(male engagement ring或者mengagement ring)，mengagement ring是man(男士)和engagement ring(订婚戒)两个词的合成形式。