| Acronym | Definition |
|---|
| LSSA | Lean Six Sigma Academy |
| LSSA | Least-Squares Spectral Analysis (mathematics) |
| LSSA | Legal Software Suppliers Association (UK) |
| LSSA | Lone Star Shooting Association (Texas) |
| LSSA | Lee's Summit Soccer Association (Lee's Summit, MO) |
| LSSA | Linear Static Stress Analysis |
| LSSA | Lutheran Social Services of Alaska |
| LSSA | Logistics Systems Support Activity |
| LSSA | Lancaster Select Soccer Association (Lancaster, OH) |
| LSSA | Lithuanian Adult Education Association |
| LSSA | Linear Solid-State Amplifier |
| LSSA | Lower Shroud Subassembly |
| LSSA | Logistics Systems Support Agency |