unauthorized absence

Thesaurus

Noun

1.

unauthorized absence - unauthorized military absence absence without leavedefection, desertion, abandonment - withdrawing support or help despite allegiance or responsibility; "his abandonment of his wife and children left them penniless"armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"