Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Gastrointestinal
Medically reviewed by Min Clinic Staff | Updated: January 2026
Gastrointestinal: Adjective referring collectively to the stomach and small and large intestines.
The commonly used abbreviation for gastrointestinal is GI. (Outside of medicine, GI can also stand for galvanized iron, general issue or government issue - as in GI Joe).