mia

plural MIA’s, MIAs for 2.

1. missing in action.
2. a soldier declared missing in action.

1. Master of International Affairs.
2. Military. missing in action.

abbreviation for

1. military, mainly US missing in action: officially unaccounted for following combat
2. (in Australia) Murrumbidgee Irrigation Area

also m.i.a., initialism of missing in action, attested from 1919 (see missing).