Relating to events before a marriage; such as, an antenuptial agreement.

A written contract between two people who are about to marry, setting out the terms of possession of assets, treatment of future earnings, control of the property of each, and potential division if the marriage is later dissolved.

These are fairly common if either or both parties have substantial assets, children from a previous marriage, potential large inheritances, high incomes, or have been "taken" by a prior spouse.