a person killed or injured in a war or an accident
The only casualty in the car accident was a woman who broke her arm.
The paramedics rushed to the scene of the accident to attend to the casualties and provide medical assistance.
The war had a devastating impact, with many soldiers and civilians becoming casualties of the conflict.
The earthquake left a trail of destruction, with numerous buildings and infrastructure becoming casualties of the natural disaster.
The firefighter bravely entered the burning building to rescue any potential casualties trapped inside.