Definition of slack adjective from the Oxford Advanced Learner's Dictionary

     

    slack

     adjective
    adjective
    BrE BrE//slæk//
     
    ; NAmE NAmE//slæk//
     
    (slacker, slackest) Running a business
     
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  1. 1not stretched tight synonym loose She was staring into space, her mouth slack. The rope suddenly went slack. slack muscles
  2. 2(of business) not having many customers or sales; not busy a slack period Wednesdays are always slack. slack demand for beef See related entries: Running a business
  3. 3(disapproving) not putting enough care, attention or energy into something and so not doing it well enough He's been very slack in his work lately. Discipline in the classroom is very slack. We lost because of some slack defending on our part.
  4. Word Originadjective Old English slæc ‘inclined to be lazy, unhurried’, of Germanic origin; related to Latin laxus ‘loose’.Extra examples Let the reins go slack. She knew she had been very slack in her church attendance recently. Some of the ropes were completely slack. The antiques business remained slack. This season has been pretty slack for local hotels so far.
See the Oxford Advanced American Dictionary entry: slack