pre ‧ nup ‧ tial a ‧ gree ‧ ment /priːˌnʌpʃ ə l əˈɡriːmənt/ BrE AmE ( 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