| Acronym | Definition |
|---|
| OIL | Oil India Ltd |
| OIL | Operation Iraqi Liberation |
| OIL | Organizzazione Internazionale del Lavoro (Italian) |
| OIL | Optical Injection Locking |
| OIL | Open Image Library |
| OIL | Oracle I-Learning |
| OIL | Ontology Interchange Language |
| OIL | Operator Identification Language |
| OIL | Ontology Inference Layer |
| OIL | Office of Immigration Litigation (Department of Justice Civil Division) |
| OIL | Ontology Interchange Language (XML) |
| OIL | Outgoing Interface List (computer networking) |
| OIL | Oklahomans for Independent Living |
| OIL | Operating Instruction Letter (California) |
| OIL | Open Issues List |
| OIL | Open Information Locator |
| OIL | OMS Interaction Language (GlobIS at ETH Zürich) |
| OIL | Ordnance Investigation Laboratory |
| OIL | Organizzazione Italiana Lubrificanti (Italian) |
| OIL | Optoelectronic Interconnection Layer |
| OIL | Open Incident Listing |
| OIL | Observation, Insight, and Lesson (US Army) |