| Acronym | Definition |
|---|
| IGI➣International Genealogical Index |
| IGI➣Indira Gandhi International (airport; India) |
| IGI➣I'm Going In |
| IGI➣International Gemological Institute |
| IGI➣Idea Group Inc. (Canada) |
| IGI➣Instrument Ground Instructor (certification; US FAA) |
| IGI➣Indian Institute of Geomorphologists (University of Allahabad; Uttar Pradesh, India) |
| IGI➣Image-Guided Intervention (medical procedure) |
| IGI➣I Get It |
| IGI➣Infotech Global, Inc (Piscataway, NJ) |
| IGI➣Institute of Geologists of Ireland |
| IGI➣International Gaming Institute (University of Nevada, Las Vegas, NV) |
| IGI➣Institute for Graphic Interfaces (South Korea) |
| IGI➣Infectious Gastrointestinal Illness |
| IGI➣Iowa Governor's Institute (University of Iowa) |
| IGI➣Institution Gang Investigator (prisons) |
| IGI➣Inspector General for Investigations |
| IGI➣Investigation Group International, Inc. (Washington, DC) |
| IGI➣Initial Gap Increasing Method |
| IGI➣Inner Grid Injection |