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Slack appears in the following tongue twister:

  • Give me the gift of a grip-top sock,
    A clip drape shipshape tip top sock.
    Not your spinslick slapstick slipshod stock,
    But a plastic, elastic grip-top sock.
    None of your fantastic slack swap slop
    From a slap dash flash cash haberdash shop.
    Not a knick knack knitlock knockneed knickerbocker sock
    With a mock-shot blob-mottled trick-ticker top clock.
    Not a supersheet seersucker rucksack sock,
    Not a spot-speckled frog-freckled cheap sheik's sock
    Off a hodge-podge moss-blotched scotch-botched block.
    Nothing slipshod drip drop flip flop or glip glop
    Tip me to a tip top grip top sock.
    (articulation warmup for actors)

Slack appears in the following palindrome (phrase that reads the same backward as forward):

  • Now if I see slack cats step on no mat, eye-taming is a sign I mate yet am on no pets stack Cal sees if I won.
View more palindromes!

The following statistics are based on the British National Corpus, so they are representative for the British English.

Distribution of usage frequency for the most common synonyms of the noun slack:


Distribution of usage frequency for the most common synonyms of the verb slack:

Video footage: Man walks on slack line tight rope
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Definition of the noun slack

What does slack mean as a name of something?

noun - plural: slacks

  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
  3. a stretch of water without current or movement
    • example: suddenly they were in a slack and the water was motionless
    • lexical domain: Natural Objects - nouns denoting natural objects (not man-made)
    • synonym of slack: slack water
    • more generic word: stretch = a large and unbroken expanse or distance
  4. a soft wet area of low-lying land that sinks underfoot
    • lexical domain: Natural Objects - nouns denoting natural objects (not man-made)
    • synonyms of slack: mire / morass / quag / quagmire
    • more generic terms: bog / peat bog = wet spongy ground of decomposing vegetation; has poorer drainage than a swamp
  5. the quality of being loose (not taut)
    • lexical domain: Attributes - nouns denoting attributes of people and objects
    • synonym of slack: slackness
    • more generic words: looseness / play = movement or space for movement
  6. a cord or rope or cable that is hanging loosely
    • example: he took up the slack
    • lexical domain: Artifacts - nouns denoting man-made objects
    • more generic word: cord = a line made of twisted fibers or threads

Alternative definition of the noun slack


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

Definition of the adjective slack

What does slack mean as an attribute of a noun?

Slack is one of the top 1000 most common adjectives in the English language.

adjective - degrees: slacker | slackest

  1. not tense or taut
    • examples: slack and wrinkled skin | slack sails | a slack rope | a slack grip
    • synonym of slack: loose
    • similar: lax
  2. flowing with little speed as e.g. at the turning of the tide
  3. lacking in rigor or strictness
    • example: slack in maintaining discipline
    • synonym of slack: lax
    • similar: negligent

Alternative definition of the adjective slack


  1. Lax; not tense; not hard drawn; not firmly extended.
  2. Weak; not holding fast.
  3. Remiss; backward; not using due diligence or care; not earnest or eager.
  4. Not violent, rapid, or pressing.

Definition of the adverb slack

What does slack mean as an attribute of something other than a noun?


  1. See Slackly.

Definition of the verb slack

What does slack mean as a doing word?

verb - inflections: slacked | slacking | slacks

  1. avoid responsibilities and work, be idle
  2. be inattentive to, or neglect
    • example: He slacks his attention
    • lexical domain: Cognition - verbs of thinking, judging, analyzing, doubting
    • more generic word: neglect = fail to attend to
  3. release tension on
    • example: slack the rope
    • syntax: the same syntax as for the sense 1
    • lexical domain: Change - verbs of size, temperature change, intensifying, etc.
    • more generic words: loose / loosen = make loose or looser
  4. make less active or fast
  5. become slow or slower
  6. make less active or intense
  7. become less in amount or intensity
  8. cause to heat and crumble by treatment with water
    • example: slack lime
    • syntax: the same syntax as for the sense 1
    • lexical domain: Change - verbs of size, temperature change, intensifying, etc.
    • synonym of slack: slake
    • more generic word: hydrate = cause to be hydrated
    • more specific word: air-slake = alter by exposure to air with conversion at least in part to a carbonate

Alternative definition of the verb slack


  1. [context: followed by “off”] to procrastinate; to be lazy
  2. [context: followed by “off”] to refuse or dislike exerting effort


The Slack is a 22 km long river in the Pas-de-Calais department, in northern France.


Who is Slack?

Slack a.k.a. John Robie is an American musician and record producer, widely credited as the driving force behind many of the most successful songs from the early 80's electro boom and is best known for his work with the New York record producer Arthur Baker.


Slack is a musical group.

  • albums: "Nothing Is Easy Enough", "Slack EP"


  1. Slack: Slak is a fictional character from the 2005 film Land of the Dead.
  2. Slack is a fictional character from the 1977 film Greased Lightning.


  1. "Slack" is a musical album of Juj.
    • released on (4 years ago)
  2. "Slack" is a musical album of Autophonic.
    • released in (9 years ago)
  3. "Slack" is a composition.


  1. Slack is a team communication tool founded by Stewart Butterfield. Slack began as an internal tool used by his company Tiny Speck in the development of Glitch, the defunct online game. Slack was launched in August, 2013, and signed up 8000 customers within 24 hours of launch.
    • developer: Slack Technologies
    • genre: Project management software
  2. Slack a.k.a. Slack Incorporated is the publishing company of Journal of Nursing Education and AAOHN Journal.
  3. Slack a.k.a. potassium channel, subfamily T, member 1 is a protein.

Phrases with Slack

Phrases starting with the word Slack:

  1. slack up
  2. slack off
  3. Slack Tub
  4. slack suit
  5. slack tide
  6. slack water
  7. slack-jawed

Phrases ending with the word Slack:

  1. Cut Someone Some Slack
  2. Cut Somebody Some Slack

Other phrase containing the word Slack:

  1. esther hobart mcquigg slack morris

Printed dictionaries and other books with definitions for Slack

Click on a title to look inside that book (if available):

Google previewChambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements)

by Various

Slack, Slack′en,to become looseor less tight:tobe remiss:toabate:to becomeslower: to fail orflag.—v.t. tomake less tight:toloosen: to relax:to remit:to abate:to withhold: to use less liberally: tocheck: (B.) to delay.—v.t.Slack′bake, to halfbake.

Google previewA Dictionary of English Etymology (1865)

Slack, Slake. ON. slak, Flem. slack, G. schlapp, schlaff, Dan. Slap, not tight, flapping, loose; N. slekkja, to make slack, and figuratively, to slake, to diminish the active force of anything to still pain or thirst, to quench the fire, to deaden, to put out.

Google previewHistorical Dictionary of the Crusades (2013)

by Corliss K. Slack

Slack. Editor's Foreword When writing the foreword to a book dealing with warfare that occurred in the Middle Ages, one wouldn't expect to use the adjective “timely.” Yet, after serious recent events, the topic of crusades is back, and ...

Google previewEncyclopedia of Computer Science and Technology (1977)

Volume 6 - Computer Selection Criteria to Curriculum Committee on Computer Science by Jack Belzer, Albert G. Holzman, Allen Kent

Thus, for activity ii-j1, the free slack is given by FSa = E,- - EFa or ESik - EF0 Critical Path 1dentification Definition: The critical path is the path with the least total slack. We will point out later that whenever scheduled times are permitted on ...

Google previewA Concise Etymological Dictionary of the English Language (1885)

by Walter William Skeat

SLACK. SLEAVE. 441 lap, sup, or lick up ; Low G. slabbern, slubbern, to slabber, lap, slip, frequent, of slabbcn, to lap.+G. schlabbern. schlabbcn, to lap, to slabber. Cf. prov. E. slap, to lick up food, eat quickly. slaver, to slabber. (Scand.) Icel.

Online dictionaries and encyclopedias with entries for Slack

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Photos about Slack

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Small photo of slack line, slack-line, slackingSmall photo of Slack Line.Small photo of Ryazan, Russia - May 04, 2018: Slack mobile app on the display of cell phone.Small photo of SAN FRANCISCO, CA – APRIL 24, 2018: Slack, tech communications tool maker, entrance and security at San Francisco location More...

Videos about Slack

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View more videos about Slack Tub and Cut Someone Some Slack.

See also the pronunciation examples of Slack!

Quotes about Slack

The strings of the harp must be not too tight, and not too slack.
more quotes about slack...

Scrabble value of S1L1A1C3K5

The value of this 5-letter word is 11 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

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