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Definition of slack:

  1. A valley, or small, shallow dell.
  2. Lax; not tense; not hard drawn; not firmly extended; as, a slack rope.
  3. Not violent, rapid, or pressing; slow; moderate; easy; as, business is slack.
  4. Remiss; backward; not using due diligence or care; not earnest or eager; as, slack in duty or service.
  5. Slackly; as, slack dried hops.
  6. Small coal; also, coal dust; culm.
  7. The part of anything that hangs loose, having no strain upon it; as, the slack of a rope or of a sail.
  8. Weak; not holding fast; as, a slack hand.


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