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A prenuptial agreement, antenuptial agreement, or premarital agreement, commonly abbreviated to prenup or prenupt, is a contract entered into prior to marriage, civil union or any other agreement prior to the main agreement by the people intending to marry or contract with each other. (Wikipedia)

A Prenuptial Agreement (often referred to as a “prenup”) is an agreement entered into by a couple before they get married setting out how they will organise their finances during the marriage and what they would wish to happen in relation to financial matters in the unhappy event of a divorce. (prenups.uk.com)

Prenuptial agreements should be legally binding in divorce settlements, but only after the needs of the separating couple and any children have been taken into account, the Law Commission has recommended. (The Guardian)