Defiance
Defiance may refer to:
- Defiance (Aerospace Fighter class), the ground-attack OmniFighter
- Defiance (BattleMech), the 75-ton BattleMech
- Defiance (Engines), fusion engine designs
- Defiance (system), the planetary system
- Defiance IV, Lyran Commonwealth DropShip
- Defiance Industries, the massive Lyran defense contractor
- Defiance 'Mech Hunter (Autocannon/20)
- Defiance 1001 (ER PPC)
- Defiance B3L (large laser)
- Defiance B3M (medium laser)
- Defiance P5M (medium pulse laser)
- Defiance Type J (Autocannon/5)