°Given to a soldier by the army (
as an item), rather than brought from home; 
or used by the army (
as a procedure), and different from its 
civilian counterpart.
            
 
            
              "Soldiers counted cadence by chanting: “GI brush / And GI comb / Gee, I wish that I was home!”"
            
        noun
          
            
              °A member of the U.S. military.
            
            
              
            
          
            
              °One who is 
demanding and 
strict, in the manner of a stereotypical member of the military.
            
 
            
              
            
        verb
          
            
            
              
            
        abbreviation