pre‧nup‧tial a‧gree‧ment /priːˌnʌpʃəl əˈɡriːmənt/ (also pre-nup /ˈpriːnʌp/ informal) noun [countable]
a legal document that is written before a man and a woman get married, in which they agree things such as how much money each will get if they divorce

[TahlilGaran] Dictionary of Contemporary English ▲