1. To change, alter, or adjust the established regulations or guidelines that govern a particular activity, game, organization, or process
The committee decided to modify the rules to make the competition more fair.
O comitê decidiu modificar as regras para tornar a competição mais justa.
2. To make partial or minor changes to existing rules without completely replacing them
We need to modify the rules slightly to accommodate new team members.
Precisamos modificar ligeiramente as regras para acomodar novos membros da equipe.