1. to make a liquid weaker by mixing it with water or another substance
Dilute the juice with water before drinking it.
Dilua o suco com água antes de beber.
2. to reduce the strength, intensity, or effect of something
His argument was diluted by weak evidence.
Seu argumento foi diluído por evidências fracas.
3. to decrease the concentration of a substance in a solution
The chemist diluted the acid for safety.
O químico diluiu o ácido por segurança.