| Acronym | Definition |
|---|
| SIIL➣Sterlite Industries India Ltd. (Tamil Nadu, India) |
| SIIL➣Sponge Iron India Limited (Hyderabad, Andhra Pradesh, India) |
| SIIL➣Serum Institute of India Ltd. (est. 1966; Pune, Maharashtra, India) |
| SIIL➣Siilinjärvi (Finnish) |
| SIIL➣Sostegno Integrato Inserimento Lavorativo (Italian: Inclusion Support Integrated Working; disabled workers) |
| SIIL➣Semantic Information Integration Laboratory (Khon Kaen University; Thailand) |