/slæk; slæk/
adj (-er, -est)
1 not tight or tense; loose 不紧的; 松弛的
*a slack rope 松弛的绳子
* The boxer's jaw went slack. 那拳击手的下巴松了下来.
* Your grip on the bar is too slack. 这根棒你握得太松了.
2 (a) ~ (at/about sth) (of a person) giving little care and energy to a task （指人）懈怠的, 疏忽的
*He's been getting slack and making silly mistakes. 他越来越懒散, 出了些荒谬的错误.
* Don't get slack about doing your exercises. 不要疏于练习.
(b) not carefully done, planned,etc; lax （做得、计画得）粗心的, 马虎的, 松散的
*Organization of the conference was rather slack. 会议的组织工作很松散.
3 (of business) not having many customers, sales, etc; not busy （指生意）清淡, 萧条, 不景气
*Trade is slack in winter. 冬季贸易不景气.
* Demand is slack over the summer months. 夏季的几个月市场滞销.
4 (esp of water) slow-moving; sluggish （尤指水流）缓慢的, 滞缓的.

v
1 [I] be lazy; avoid work 怠惰; 偷懒
*Stop slacking and get on with that digging! 别偷懒, 继续挖!
2 (phr v) slack off/up
(a) reduce one's level of activity 松懈; 放松
*After intense work in the summer, we are slacking off now. 夏季紧张的工作过後, 我们现在放松了.
(b) reduce speed 减速; 放慢
*Slack off/up as you approach the junction. 接近交叉口时要减速. slack (sth) up make (a rope, etc) less tight or tense 将（绳子等）放松.

/slæk; slæk/
n
1 [U] slack part of a rope, etc （绳等的）松弛部分
*too much slack in the tow-rope 拖缆很松.
2 slacks [pl] casual trousers for men or women 宽松的裤子（便装的男裤或女裤）
*a pair of slacks 一条宽松的裤子.
3 [U] coal-dust left over after coal has been screened （煤经筛後剩下的）煤末.
4 (idm 习语) take up the `slack
(a) pull on a rope, etc so that it is no longer slack 拉紧绳子
*The tractor took up the slack and pulled the trailer out of the mud. 拖拉机拉紧拖缆把拖车从泥中拉了出来.
(b) (in industry) make little-used resources more productive （工业中）充分利用闲置资源.