A prenuptial agreement or contract WordNet 3.0 & Open English WordNet

A prenuptial agreement, antenuptial agreement, or premarital agreement is a written contract entered into by a couple before marriage or a civil union that enables them to select and control many of the legal rights they acquire upon marrying, and what happens when their marriage eventually ends by death or divorce. Wikipedia

A contract entered into prior to marriage or civil union. Wikipedia Disambiguation

Written contract entered into by a couple prior to marriage or a civil union Wikidata

A legal document, signed by both parties before marriage, stating the legal claims on each other's estate in case of divorce. OmegaWiki

A legal document, signed by both parties before marriage, stating the legal claims on each other's estate upon a subsequent divorce. Wiktionary

Document stating legal claims upon a divorce. Wiktionary (translation)