| Acronym | Definition |
|---|
| IGU➣International Geographical Union |
| IGU➣International Gas Union |
| IGU➣Insulated Glass Units (windows) |
| IGU➣I Got U |
| IGU➣Income Generating Unit (various organizations) |
| IGU➣Iguassu Falls, Parana, Brazil (Airport Code) |
| IGU➣Internationale Gruppe für Umweltstudien (Zurich, Switzerland) |
| IGU➣Indian Geophysical Union |
| IGU➣International Goodwill and Understanding (Soroptomist International) |
| IGU➣I Give Up |