ISIL
| Acronym | Definition |
|---|---|
| ISIL | Islamic State of Iraq and the Levant (group) |
| ISIL | International Society for Individual Liberty |
| ISIL | Indian Society of International Law (est. 1959) |
| ISIL | International Standard Identifier for Libraries and Related Organizations (alphanumeric designation) |
| ISIL | Interim Support Items List |
| ISIL | Investor Services of India Ltd. (Thane, Maharashtra, India) |
| ISIL | Intelligence Systems Integration Laboratory (Ft. Huachuca, Arizona; US Army facility for integrating intelligence systems) |