a lightweight, two-piece, usually white garment worn by barefooted martial-arts participants, consisting of loose-fitting pants and a wraparound jacket with cloth belt.
Origin: 1915–20; orig. abbr. of galvanized iron, used in U.S. Army bookkeeping in entering articles (e.g., trash cans) made of it; later extended to all articles issued (as an assumed abbrev. of government issue) and finally to soldiers themselves
Geographic Information System n.
Abbr. GIS A computer application used to store, view, and analyze geographical information, especially maps.
GI 1 (jē'ī') n. An enlisted person in or a veteran of any of the U.S. armed forces, especially a person enlisted in the army. adj.
Relating to or characteristic of an enlisted person.
Conforming to or in accordance with U.S. military regulations or procedures.
Issued by an official U.S. military supply department.
adv. In strict accordance with military regulations or practices. tr.v.
GI'd, GI'ing, GI'sSlang To clean (barracks, for example) thoroughly for or as if for an inspection.
[From abbreviation of galvanized iron (applied to trash cans, etc.), later reinterpreted as government issue.]
[gee] 
