1. to reduce the number, severity, or frequency of complaints or grievances
The company implemented new policies to diminish complaints from customers.
A empresa implementou novas políticas para diminuir reclamações dos clientes.
2. to make complaints seem less important or valid; to downplay grievances
The manager tried to diminish complaints by suggesting they were minor issues.
O gerente tentou diminuir reclamações sugerindo que eram problemas menores.