1. to support, maintain, or defend established social, cultural, or legal customs and standards
She decided to uphold conventions by wearing a formal dress to the wedding.
Ela decidiu manter as convenções usando um vestido formal no casamento.
2. to affirm or sustain a decision, rule, or principle that is traditionally accepted
The court voted to uphold conventions regarding inheritance laws.
O tribunal votou para manter as convenções sobre leis de herança.