XB
| Acronym | Definition |
|---|---|
| XB | Experimental Bomber (US military aircraft designation) |
| XB | Xbox (Microsoft video game console) |
| XB | Halifax to Boston (routing designation; US Navy; Canada and US) |
| XB | X-Band |
| XB | Extra-Budgetary |
| XB | Exchangeable Bonds (corporate finance) |
| XB | X-Bracings (structures) |