1
: provided by an official U.S. military supply department
GI shoes
2
: of, relating to, or characteristic of U.S. military personnel
3
: conforming to military regulations or customs
a GI haircut
plural GIs or GI's
ˌjē-ˈīz 
: a member or former member of the U.S. armed forces
especially
: a man enlisted in the army
: in a strictly regulation manner
: to clean (something) thoroughly in preparation for or as if for a military inspection
The barracks … were in fine order—they'd been GI'd the night before.—
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Examples of gi in a Sentence
Verb
in preparation for one of her mother-in-law's dreaded visits, she had GI'd the whole house
Recent Examples on the WebCristina Mutchler, Health, 31 July 2024
Yogurt or milk can coat your esophagus and upper gastrointestinal (GI) tract when it is irritated by too much stomach acid.
Bananas, which are alkaline, can counteract the high acidity of stomach acid.
—Anna Giorgi, Verywell Health, 29 July 2024
Doxycycline is more likely to cause GI side effects and sun sensitivity.
—Megan Nunn, Verywell Health, 12 July 2024
In the wake of World War II, the passage of the GI Bill created a surge in demand for higher education across the country.
—Sarah Stoller / Made By History, TIME, 11 July 2024
See all Example Sentences for gi 
Noun
Antibiotics or antiparasitics are often prescribed for a GI infection.181920
Dietary changes: A gluten-free diet is necessary to manage a chronic condition like celiac disease.
—Cristina Mutchler, Health, 31 July 2024
Yogurt or milk can coat your esophagus and upper gastrointestinal (GI) tract when it is irritated by too much stomach acid.
Bananas, which are alkaline, can counteract the high acidity of stomach acid.
—Anna Giorgi, Verywell Health, 29 July 2024
Doxycycline is more likely to cause GI side effects and sun sensitivity.
—Megan Nunn, Verywell Health, 12 July 2024
In the wake of World War II, the passage of the GI Bill created a surge in demand for higher education across the country.
—Sarah Stoller / Made By History, TIME, 11 July 2024
See all Example Sentences for gi
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'gi.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near gi
Cite this Entry
“Gi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gi. Accessed 18 Aug. 2024.
Copy CitationKids Definition
GI
1 of 2 adjective
: of, relating to, or characteristic of U.S. military forces
GI
2 of 2 noun
plural GIs or GI's
: a member or former member of the U.S. armed forces
Etymology
Adjective
from the abbreviation for galvanized iron used in listing such articles as garbage cans, but mistaken as standing for government issue
Medical Definition
GI
abbreviation1
gastrointestinal
2
glycemic index
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