A casualty in
In military usage, a casualty is a person in service
The military organisation
In relation to personnel, any person who is lost to his organization by reason of being declared dead, wounded, diseased, detained, captured or missing.
Any casualty incurred as the direct result of hostile action, sustained in combat or relating thereto, or sustained going to or returning from a combat mission.
A person who is not a battle casualty, but who is lost to his organization by reason of disease or injury, including persons dying from disease or injury, or by reason of being missing where the absence does not appear to be voluntary or due to enemy action or to being interned.
These definitions are popular among military historians.
In relation to personnel, any person incapacitated by wounds sustained or diseases contracted in a combat zone, as well as any person admitted to a medical installation for treatment or recuperation for more than a day. There is a distinction between combat medical casualty and non-combat medical casualty. The former refers to a medical casualty that is a direct result of combat action; the latter refers to a medical casualty that is not a direct result of combat action
A casualty classification generally used to describe any person killed by means of the action of hostile forces.
A casualty classification generally used to describe any person who has incurred an injury by means of action of hostile forces.
A casualty classification generally used to describe any person captured and held in custody by hostile forces.