LSY
| Acronym | Definition |
|---|---|
| LSY | Lufthansa Systems (software) |
| LSY | Lismore, New South Wales, Australia - Lismore (Airport Code) |
| LSY | Lord Sullivan Yoder (public relations; Columbus, OH) |
| LSY | Law Society of Yukon (Whitehorse, Yukon, Canada) |
| LSY | Large Scale Yielding |