1. to reduce the gap or distance between two quantities, values, or positions
We need to decrease the difference between our budget and actual spending.
Precisamos diminuir a diferença entre nosso orçamento e os gastos reais.
2. to make two things more similar or closer in value
The new policy aims to decrease the difference in salaries across departments.
A nova política visa diminuir a diferença de salários entre departamentos.