音标：['fɑ:stnis]
n. 要塞, 巩固, 迅速
【医】 抗拒性
英汉词典

fastness的短语、例句：

fastness n[U] quality of being fast2(2) 不褪色
We guarantee the fastness of these dyes. 我们担保这些染料不褪色. fastness n fortified place that is easily defended; stronghold 堡垒; 要塞
a mountain fastness 山寨.