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GI

[jee-ahy] /ˈdʒiˈaɪ/
noun, plural GI's or GIs.
1.
a member or former member of the U.S. armed forces, especially an enlisted soldier.
adjective
2.
rigidly adhering to military regulations and practices; regimented; spit-and-polish:
a platoon leader who tried to be more GI than anyone else.
3.
of a standardized style or type issued by the U.S. armed forces:
GI shoes; GI blankets.
4.
conforming to the regulations or practices of the U.S. armed forces:
Every recruit must get a GI haircut.
5.
of, relating to, or characteristic of a U.S. enlisted person:
a typical peacetime GI complaint.
verb (used with object), GI'd, GI'ing.
6.
to clean in preparation for inspection:
to GI the barracks.
verb (used without object), GI'd, GI'ing.
7.
to follow military regulations and customs closely; shape up:
You'd better learn to GI if you want to be promoted.
Also, G.I.
Origin
1915-1920
1915-20; orig. abbreviation 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 abbreviation of government issue) and finally to soldiers themselves

G.I.

1.
galvanized iron.
3.
general issue.
4.
government issue.
Also, GI, g.i.

GI's

[jee-ahyz] /ˈdʒiˈaɪz/
noun
1.
the GI's, Slang. diarrhea.
Also, G.I.'s, G.I.s.
Origin
1960-65, Americanism; probably for GI shits; see GI, -s3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for g. i.

gi1

/ɡiː/
noun
1.
a loose-fitting white suit worn in judo, karate, and other martial arts: a karate gi
Word Origin
from Japanese -gi costume, from ki to wear

gi2

abbreviation
1.
Gibraltar

Gi

abbreviation
1.
gilbert

GI1

noun (US, informal)
1.
(pl) GIs, GI's. a soldier in the US Army, esp an enlisted man
adjective
2.
conforming to US Army regulations; of standard government issue
Word Origin
C20: abbrev. of government issue

GI2

abbreviation
1.
gastrointestinal
2.
glycaemic index
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for g. i.

G.I.

also GI, 1936 as an adjective meaning "U.S. Army equipment," American English, apparently an abbreviation of Government Issue, and applied to anything associated with servicemen. Transferred sense of "U.S. Army soldier" arose during World War II (first recorded 1943), apparently from the jocular notion that the men themselves were manufactured by the government.

An earlier G.I. (1908) was an abbreviation of galvanized iron, especially in G.I. can, a type of metal trash can; the term was picked up by U.S. soldiers in World War I as slang for a similar-looking type of German artillery shells. But it is highly unlikely that this G.I. came to mean "soldier." No two sources seem to agree on the entire etymology, but none backs the widespread notion that it stands for *General Infantry. GI Joe "any U.S. soldier" attested from 1942 (date in OED is a typo).

Online Etymology Dictionary, © 2010 Douglas Harper
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g. i. in Medicine

GI abbr.

  1. gastrointestinal

  2. Gingival Index

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for g. i.

GI

adjective

Of, in, or from the US armed forces, esp the Army; government issue: GI shoes/ His officious ways are very GI (WWI armed forces)

noun

A member of the US armed forces, esp an enlisted Army soldier serving since or during World War II: The GIs fought furiously to hold Taejon (Armed forces)

verb

To scrub and make trim: They GIed the barracks every Friday night (WWII Army)

Related Terms

gi party, the gis


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Related Abbreviations for g. i.

gi

gill

GI

  1. galvanized iron
  2. gastrointestinal
  3. general issue
  4. glycemic index
  5. Government Issue
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for g. i.

gi

in measurement, unit of volume in the British Imperial and United States Customary systems. It is used almost exclusively for the measurement of liquids. Although its capacity has varied with time and location, in the United States it is defined as half a cup, or four U.S. fluid ounces, which equals 7.219 cubic inches, or 118.29 cubic cm; in Great Britain the gill is five British fluid ounces, which equals 8.669 cubic inches, one-fourth pint, or 142.07 cubic cm.

Learn more about gi with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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