fortress /ˈfɔ:tris/ n. ［c］城堡；要塞：The easiest way to capture a fortress is from within.堡垒是最容易从内部攻破的。The fortress is an imposing building.这座城堡是一座宏伟的建筑。Greek warriors took the fortress with little effort.希腊武士毫不费力地攻占了这个要塞。They took refuge in the fortress.他们在堡垒中避难。