ex-serviceman(n = noun.person) vet, veteran - a person who has served in the armed forces;
is a kind of man, military man, military personnel, serviceman
is a member of american legion, veterans of foreign wars, vfw
has particulars: legionnaire
a person who has served in the armed forces. [WordNet 1.5]
ex-serviceman, n. (pl. -men) a former member of the armed forces.