slack /slæk/ I. adj. 1. 松(弛)的：a slack rope 松弛的绳 2. 松闲的，不活跃的：Business is slack at this season. 这个季节营业萧条。3. 懈怠的，马虎的：be slack in doing one’s duty 玩忽职守［考句］A slack official is one who is irresponsible in his work.玩忽职守的官员就是对工作不负责任。‖II. n.［u］ (绳索等)松弛部分：There’s too much slack in these ropes. 绳太松了。The men pulled on the ropes to take up the slack (= to tighten them). 大家把绳拉紧。‖III.vi. 懈怠，懒散: Don’t slack off in your studies.不要放松学习。