Adjective slack has 4 senses
  1. loose, slack - not tense or taut; "the old man's skin hung loose and gray"; "slack and wrinkled skin"; "slack sails"; "a slack rope"
    Antonym: tense (indirect, via lax)
  2. flaccid, lax, limp, slack - 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"
    Antonym: strong (indirect, via weak)
  3. slack - flowing with little speed as e.g. at the turning of the tide; "slack water"
    Antonym:
    running (indirect, via standing)
  4. lax, slack - lacking in rigor or strictness; "such lax and slipshod ways are no longer acceptable"; "lax in attending classes"; "slack in maintaining discipline"
    Antonym: diligent (indirect, via negligent)
,Noun slack has 5 senses
  1. slack - dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve
    --1 is a kind of
    debris, dust, junk, rubble, detritus
    Derived form: verb slack8
  2. slump, slack, drop-off, falloff, falling off - 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"
    --2 is a kind of deterioration, decline in quality, declension, worsening
    Derived forms: verb slack6, verb slack5, verb slack4
  3. slack - a stretch of water without current or movement; "suddenly they were in slack water"
    --3 is a kind of
    stretch
  4. slack, slackness - the condition of being loose (not taut); "he hadn't counted on the slackness of the rope"
    --4 is a kind of looseness, play
    Derived form: verb slack3
  5. slack - a cord or rope or cable that is hanging loosely; "he took up the slack"
    --5 is a kind of
    cord
    Derived form: verb slack3
,Verb slack has 8 senses
  1. slack - avoid responsibilities and work, be idle
    --1 is one way to
    fiddle, shirk, shrink from, goldbrick
    Derived forms: noun slacker1, noun slacking1
    Sample sentence:
    Somebody ----s
  2. slack - be inattentive to, or neglect; "He slacks his attention"
    --2 is one way to
    neglect
    Derived form: noun slacking1
    Sample sentence:
    Somebody ----s something
  3. slack - release tension on; "slack the rope"
    --3 is one way to
    loosen, loose
    Derived forms: noun slack5, noun slack4
    Sample sentences:
    Somebody ----s something
    Something ----s something
  4. slack, slacken, slack up, relax - make less active or fast; "He slackened his pace as he got tired"; "Don't relax your efforts now"
    --4 is one way to decrease, lessen, minify
    Derived form: noun slack2
    Sample sentences:
    Somebody ----s something
    Something ----s something
  5. slow, slow down, slow up, slack, slacken - become slow or slower; "Production slowed"
    --5 is one way to weaken
    Derived form: noun slack2
    Sample sentences:
    Something ----s
    Somebody ----s
  6. slake, abate, slack - make less active or intense
    --6 is one way to decrease, lessen, minify
    Derived form: noun slack2
    Sample sentences:
    Somebody ----s something
    Something ----s something
  7. abate, let up, slack off, slack, die away - become less in amount or intensity; "The storm abated"; "The rain let up after a few hours"
    --7 is one way to decrease, diminish, lessen, fall
    Sample sentence:
    Something ----s
  8. slack, slake - cause to heat and crumble by treatment with water; "slack lime"
    --8 is one way to hydrate
    Derived form: noun slack1
    Sample sentence:
    Somebody ----s something
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