1. Small coal; coal dust.
  2. A valley, or small, shallow dell.
  3. The part of anything that hangs loose, having no strain upon it.
    The slack of a rope or of a sail.
  4. A tidal marsh or shallow, that periodically fills and drains.


  1. To slacken.
  2. To mitigate; to reduce the strength of.
  3. to procrastinate; to be lazy
  4. to refuse to exert effort
  5. To lose cohesion or solidity by a chemical combination with water; to slake.
    Lime slacks.


  1. Lax; not tense; not hard drawn; not firmly extended.
    a slack rope
  2. Weak; not holding fast.
    a slack hand
  3. Remiss; backward; not using due diligence or care; not earnest or eager.
    slack in duty or service
  4. Not violent, rapid, or pressing.
    Business is slack.
  5. vulgar; sexually explicit, especially in dancehall music


  1. Slackly.
    slack dried hops

The above text is a snippet from Wiktionary: slack
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