From Longman Dictionary of Contemporary EnglishGIGI /ˌdʒiː ˈaɪ/ noun [countable] PMAa soldier in the US army, especially during the Second World War
Examples from the Corpus
GI• Medical helicopters were so fast and efficient that a GI wounded in action could be on an operating table within fifteen minutes.• He was a GI making an anti-Semitic joke.• There was a feeling of helpless impotence which permeated up through the ranks from GI to Supreme Command.• For one GI there is a brief visit to Saigon, cut short when his money is exhausted.• He studied acting under the GI Bill and after touring in summer stock he began landing parts in television as heavies.• So we can write where GI t is current gross investment and R t is current replacement investment. 