| Acronym | Definition |
|---|
| LLSR➣Lost Lake Scout Reservation (Boy Scouts of America) |
| LLSR➣Lifelong Learning and Service Recognition (Academy of General Dentistry) |
| LLSR➣Londonderry and Lough Swilly Railway |
| LLSR➣Linear Least Square Regression (mathematics) |
| LLSR➣Long-Latency Stretch Response |