| Acronym | Definition |
|---|
| ALTB➣Airborne Laser Test Bed (missile defense) |
| ALTB➣Actief Leren Transparant Beoordelen (Dutch: Transparent Active Learning Rate) |
| ALTB➣Acute Laryngotracheobronchitis |
| ALTB➣Arnhemsche Lawn Tennis Bond (Dutch: Arnhem Schenardi Federal Lawn Tennis) |