definition of
GI

[1] #1 GI n. [gilbert, Gb, Gi] a unit of magnetomotive force equal to 0.7958 ampere-turns. wn

[2] #2 GI v. [G.I.] clean in preparation for inspection; "the soldiers GIed the barracks". wn

[3] #3 GI a. [gastrointestinal] of or relating to the stomach and intestines; "a gastrointestinal disorder". wn