| Acronym | Definition |
|---|
| SLI | Scalable Link Interface |
| SLI | Slider(s) |
| SLI | Specific Language Impairment (developmental language disorder) |
| SLI | Starting, Lighting and Ignition (automotive/batteries) |
| SLI | Standard Life Investments |
| SLI | Speech Language Impairment |
| SLI | Space Launch Initiative (NASA planning) |
| SLI | Supplementary Liability Insurance |
| SLI | System-Level Integration |
| SLI | Shipper's Letter of Instruction (shipping) |
| SLI | Sports Legacy Institute |
| SLI | Sylvania Lighting International |
| SLI | Speech and Language Impaired |
| SLI | Società di Linguistica Italiana |
| SLI | Somerset Light Infantry (British Army; 13th Regiment of Foot) |
| SLI | Subscriber Line Interface (Siemens) |
| SLI | Southwestern Louisiana Institute |
| SLI | Session Level Interface |
| SLI | somatostatin-like immunoreactivity |
| SLI | Scottish Life International |
| SLI | Street Lamp Interference (SLIder) |
| SLI | Science Laboratories Infrastructure |
| SLI | Safe Load Indicator |
| SLI | Solid Liquid Interface |
| SLI | Spoken Language Impairment |
| SLI | Service Logic Interpreter (ITS) |
| SLI | Small and Large Intestine |
| SLI | Strategic List Item |
| SLI | Scuderia Lancia Intégrale (French car club) |
| SLI | Success Likelihood Index |
| SLI | Scanline Interleave Mode (PC video card mode) |
| SLI | Skinner Leadership Institute (Tracy’s Landing, MD) |
| SLI | Student Life Instructor |
| SLI | Sunray Lighting Inc (Arvada, CO) |
| SLI | Seminario de Linguistica Informatica (computational linguistics group) |
| SLI | Suppress Length Indication |
| SLI | Shelf Life Item |
| SLI | survivorship life insurance |
| SLI | Sandia Laboratory Instruction |
| SLI | Sodium Lauryl Isethionate |
| SLI | Starter Light Ignition |
| SLI | Source Language Instruction (old IBM mainframes) |
| SLI | Stark Line Intensity |
| SLI | Sherman Block Leadership Institute |
| SLI | System Level Infrastructure |
| SLI | State Labour Inspectorate (various locations) |
| SLI | Supplemental Life Insurance |
| SLI | Sign Languages International (est. 1992) |