promise that a marriage will take place. In societies in which premarital sexual relations are condoned or in which consensual union is common, betrothal may be unimportant. In other societies, however, betrothal is a formal part of the marriage process. In such cases a change of intention by one of the parties is a serious matter and may be referred to as a breach of promise, a civil transgression subject in some instances to a fine or other penalty
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