| Acronym | Definition |
|---|
| LSSR➣Lake Superior Scottish Regiment (Canada) |
| LSSR➣Latvian Soviet Socialist Republic |
| LSSR➣Lithuanian Soviet Socialist Republic |
| LSSR➣Little Sioux Scout Ranch (Boy Scouts of America; Iowa) |
| LSSR➣Linear Stress-Strain Relationship (elastic materials) |
| LSSR➣Long-Range Secondary Surveillance Radar (Japan) |