English

Definition of GI noun from the Oxford Advanced Learner's Dictionary

 

GI

 noun
noun
BrE BrE//ˌdʒiː ˈaɪ//
 
; NAmE NAmE//ˌdʒiː ˈaɪ//
 
The army
 
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(pl. GIs) a soldier in the US armed forces See related entries: The army Word Origin 1930s (originally denoting equipment supplied to US forces): abbreviation of government (or general) issue.
See the Oxford Advanced American Dictionary entry: GI