1. The process of becoming worse in quality, condition, or value
The deterioration of the building's structure required immediate repairs.
A deterioração da estrutura do edifício exigiu reparos imediatos.
2. Decline or degradation in physical, mental, or moral state
The patient showed signs of mental deterioration.
O paciente mostrou sinais de deterioração mental.
3. Decay or decomposition of materials or substances
The deterioration of the food occurred due to improper storage.
A deterioração do alimento ocorreu devido ao armazenamento inadequado.