| Acronym | Definition |
|---|
| ILI | Influenza Like Illness |
| ILI | I Love It |
| ILI | Institute of Life Insurance (now American Council of Life Insurers) |
| ILI | Indian Law Institute (est. 1956) |
| ILI | Iran Language Institute (est. 1979) |
| ILI | Incorrect Length Indicator |
| ILI | International Law Institute |
| ILI | Internet Librarian International |
| ILI | Institute for Learning Innovation (Edgewater, MD) |
| ILI | International Literacy Institute |
| ILI | Inline Inspection |
| ILI | Indigenous Language Institute |
| ILI | Instrumentation and Laboratory Improvement |
| ILI | Irish Life International (Ireland) |
| ILI | Information Literacy Initiative (various universities) |
| ILI | Iliamna, AK, USA (Airport Code) |
| ILI | Individual Level Intervention (public health) |
| ILI | Infosys Leadership Institute |
| ILI | Independent Long Island |
| ILI | International Lubricants, Inc. |
| ILI | I Like Ike |
| ILI | Intelligent Link Interface (routers) |
| ILI | Insular Language Institute (Isla Margarita, Venezuela) |
| ILI | Institute for Land Information |
| ILI | International Learning Institute |
| ILI | International Language Institution |
| ILI | Institutionally-Priced Life Insurance |
| ILI | Intelligent Line Interface |
| ILI | Instant Lunar Ionosphere |
| ILI | Investors Life Insurance Company of Nebraska |
| ILI | Institute for Logic and Intelligence |