- Noun - 1. dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve - 2. a noticeable deterioration in performance or quality; "the team went into a slump""a gradual slack in output""a drop-off in attendance""a falloff in quality"- 3. a stretch of water without current or movement; "suddenly they were in slack water"- 4. the condition of being loose (not taut); "he hadn't counted on the slackness of the rope"- 5. a cord or rope or cable that is hanging loosely; "he took up the slack"
- Verb - 1. avoid responsibilities and work, be idle - 2. be inattentive to, or neglect; "He slacks his attention"- 3. release tension on; "slack the rope"- 4. make less active or fast; "He slackened his pace as he got tired""Don't relax your efforts now"- 5. become slow or slower; "Production slowed"- 6. make less active or intense - 7. become less in amount or intensity; "The storm abated""The rain let up after a few hours"- 8. cause to heat and crumble by treatment with water; "slack lime"
- Adjective - 1. not tense or taut; "the old man's skin hung loose and gray""slack and wrinkled skin""slack sails""a slack rope"- 2. lacking in strength or firmness or resilience; "flaccid muscles""took his lax hand in hers""gave a limp handshake""a limp gesture as if waving away all desire to know" G.K.Chesterton"a slack grip"- 3. flowing with little speed as e.g. at the turning of the tide; "slack water"- 4. lacking in rigor or strictness; "such lax and slipshod ways are no longer acceptable""lax in attending classes""slack in maintaining discipline"