gi
[noun]
Synonyms: soldier, fighter, fighting man, man-at-arms, serviceman, swad, swaddy, sweat, warrior

[TahlilGaran] English Synonym Dictionary ▲

GI /ˌdʒiː ˈaɪ/ noun [countable]
a soldier in the US army, especially during the Second World War

[TahlilGaran] Dictionary of Contemporary English ▲

GI
Government Issue - stamped on US military equipment and often means US soldier
The man went to the store and bought a GI Joe doll for his son.

[TahlilGaran] English Idioms Dictionary ▲

g.i.
(Government Issue) n. An American soldier.
After the war many GI's were able to get a free education.

[TahlilGaran] English Idioms Dictionary ▲

GI
Get(s) It 
Government Issue (as in GI Joe)

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲