| Abbreviation | Definition |
|---|---|
| LSX | Landing Ship, eXperimental |
| LT | Large Tug |
| LT | Leadership Training |
| LT | Lieutenant |
| LT | Light |
| LT | Light and Tough |
| LT | Lightweight Tactical |
| LT | Little Terror |
| LT | Local Terminal |
| LT | Long Term |
| LTA | Lighter Than Air |
| LTA | Local Training Area |
| LTA | Local Training Authority |
| LTAC | Light Tactical |
| LTACFIRE | Light Tactical Fire Direction System |
| LTB | Leader Training Brigade |
| LTBT | Limited Test Ban Treaty |
| LTC | Leadership Training Class |
| LTC | Lieutenant Colonel |
| LTC | Long Term Captive |