slack
1. [ adjective ] not tense or taut
Synonyms: loose
Examples:

"the old man's skin hung loose and gray" "slack and wrinkled skin" "slack sails" "a slack rope"

Related terms: lax
2. [ noun ] the condition of being loose (not taut)
Synonyms: slackness
Examples:

"he hadn't counted on the slackness of the rope"

Related terms: looseness
3. [ noun ] a noticeable decline in performance
Synonyms: slump falloff falling_off drop-off
Examples:

: "the team went into a slump" "a sudden slack in output" "a drop-off in attendance" "a falloff in automobile sales"

Related terms: decline deterioration slow slump slake
4. [ verb ] cause to heat and crumble by treatment with water, as of lime
Synonyms: slake
Related terms: hydrate air-slake
5. [ verb ] become less in amount or intensity
Synonyms: die_away let_up slack_off abate
Examples:

"The storm abated" "The rain let up after a few hours"

Related terms: decrease letup
6. [ adjective ] flowing with little speed as e.g. at the turning of the tide
Examples:

"slack water"

Related terms: standing
7. [ verb ] become slow or slower
Synonyms: slacken slow_down slow slow_up
Examples:

"Production slowed"

Related terms: weaken slump
8. [ verb ] make less active or fast
Synonyms: slacken relax slack_up
Examples:

"He slackened his pace as he got tired" "Don't relax your efforts now"

Related terms: decrease relaxation
9. [ verb ] release tension on
Examples:

"slack the rope"

Related terms: loosen
10. [ verb ] be inattentive to, or neglect, as of duties
Examples:

: "He slacks his attention"

Related terms: neglect shirking
11. [ verb ] avoid responsibilities and work, be idle
Related terms: shirk slacker
12. [ adjective ] lacking in rigor or strictness
Synonyms: lax
Examples:

"such lax and slipshod ways are no longer acceptable" "lax in attending classes" "slack in maintaining discipline"

Related terms: negligent
13. [ adjective ] lacking in strength or firmness or resilience
Synonyms: limp lax flaccid
Examples:

"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"

Related terms: weak
14. [ verb ] make less active or intense
Synonyms: abate slake
Related terms: decrease slump
15. [ noun ] a stretch of water without current or movement
Examples:

"suddenly they were in slack water"

Related terms: stretch
16. [ noun ] dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve
Related terms: debris
17. [ noun ] Last name, frequency rank in the U.S. is 3139
18. [ noun ] a cord or rope or cable that is hanging loosely
Examples:

"he took of the slack"

Related terms: cord
Similar spelling:   slacks
  Slick
  Sloas
  slice
  sleek
  Slask
  slake
  sleazy
  sleaze
  sls
  Slowik