- 防御性 fángyùxìng defensivedefensive (weapons)
- 防御工事 fángyùgōngshì fortificationstructures or works constructed for the purpose of defense in warfare, such as bunkers, trenches, or walls
- 防御率 fángyùlǜ earned run averageearned run average (baseball)
- 战略防御倡议 zhànlüèfángyùchàngyì Strategic Defense InitiativeStrategic Defense Initiative (SDI), popularly known as "Star Wars"
- 核防御 héfángyù nuclear defense
- 防御术 fángyùshù defensive art
