Missing in action is a casualty classification assigned to combatants, military chaplains, combat medics, and prisoners of war who are reported missing during wartime or ceasefire. They may have been killed, wounded, captured, executed, or deserted.

What does Mia in slang mean?

MIA usually means "Missing In Action."

What does I'm going MIA mean?

MIA stands for "Missing In Action" and means that the person has been captured or killed. AWOL stands for "Absent WithOut Leave" and means that the person left without permission.