1. People killed or injured in a war, accident, or disaster
The hospital reported 50 casualties from the accident.
O hospital relatou 50 vítimas do acidente.
2. A person or thing that is badly damaged or destroyed
Small businesses were casualties of the economic recession.
Pequenos negócios foram vítimas da recessão econômica.
3. In military context: soldiers killed, wounded, missing, or captured
The battle resulted in heavy casualties on both sides.
A batalha resultou em pesadas perdas de ambos os lados.