See the full definition of the marriage agreement in the English-speaking learners` dictionary, a contract concluded before marriage, civil union or any other agreement prior to the main agreement by those intending to marry or enter into a contract. These examples are automatically selected from different online sources of information to reflect the current use of the term « pre-contract. » The opinions expressed in the examples do not reflect the views of Merriam-Webster or its publishers. Send us comments. Britannica.com: Encyclopedia article on marriage convention kapitulaciones prematrimoniale / acuerdo prematrimoniale.