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Synonyms

slack

1 American  
[slak] / slæk /

adjective

  1. not tight, taut, firm, or tense;

    a slack rope.

    Synonyms:
    relaxed
  2. negligent; careless; remiss.

    slack proofreading.

    Synonyms:
    thoughtless, lazy, lax
  3. slow, sluggish, or indolent.

    He is slack in answering letters.

    Synonyms:
    listless, tardy, dilatory
  4. not active or busy; dull; not brisk.

    the slack season in an industry.

    Synonyms:
    quiet, idle
  5. moving very slowly, as the tide, wind, or water.

  6. Phonetics. weak; lax.

  7. Nautical. easy.


adverb

  1. in a slack manner.

noun

  1. a slack condition or part.

  2. the part of a rope, sail, or the like, that hangs loose, without strain upon it.

  3. a decrease in activity, as in business or work.

    a sudden slack in output.

    Synonyms:
    relaxation
  4. a period of decreased activity.

  5. Geography. a cessation in a strong flow, as of a current at its turn.

  6. a depression between hills, in a hillside, or in the land surface.

  7. Prosody. (in sprung rhythm) the unaccented syllable or syllables.

  8. British Dialect. a morass; marshy ground; a hollow or dell with soft, wet ground at the bottom.

verb (used with object)

  1. to be remiss in respect to (some matter, duty, right, etc.); leave undone; shirk.

    He slacked the most important part.

    Synonyms:
    neglect
  2. to make or allow to become less active, vigorous, intense, etc.; relax (efforts, labor, speed, etc.); lessen; moderate (often followed byup ).

    Synonyms:
    slacken, reduce
  3. to make loose, or less tense or taut, as a rope; loosen (often followed by off orout ).

  4. to slake (lime).

verb (used without object)

  1. to be remiss; shirk one's duty or part.

    Synonyms:
    malinger
  2. to become less active, vigorous, rapid, etc. (often followed byup ).

    Business is slacking up.

  3. to become less tense or taut, as a rope; to ease off.

  4. to become slaked, as lime.

idioms

  1. take up the slack,

    1. to pull in or make taut a loose section of a rope, line, wire, etc..

      Take up the slack before releasing the kite.

    2. to provide or compensate for something that is missing or incomplete.

      New sources of oil will take up the slack resulting from the embargo.

slack 2 American  
[slak] / slæk /

noun

  1. the fine screenings of coal.


slack 1 British  
/ slæk /

adjective

  1. not tight, tense, or taut

  2. negligent or careless

  3. (esp of water, etc) moving slowly

  4. (of trade, etc) not busy

  5. phonetics another term for lax

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adverb

  1. in a slack manner

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a part of a rope, etc, that is slack

    take in the slack

  2. a period of decreased activity

    1. a patch of water without current

    2. a slackening of a current

  3. prosody (in sprung rhythm) the unstressed syllable or syllables

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to neglect (one's duty, etc)

  2. (often foll by off) to loosen; to make slack

  3. chem a less common word for slake

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
slack 2 British  
/ slæk /

noun

  1. small pieces of coal with a high ash content

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • slackingly adverb
  • slackly adverb
  • slackness noun
  • unslacked adjective
  • unslacking adjective

Etymology

Origin of slack1

First recorded before 900; Middle English adjective slak(e), slakke, Old English slæc, sleac; cognate with Old Norse slakr, Old High German slach, Latin laxus lax

Origin of slack2

First recorded in 1200–50; of uncertain origin; compare Middle English sleck “mud, slush, stony soil,” Flemish slecke, Middle Dutch slacke, slecke, Dutch slak, Low German slak(ke), German Schlacke “dross (of metal)”

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Those department reductions and policy shifts affecting aviation oversight and transportation funding have left little slack when these kinds of storms hit.

From Salon

When one engine slows, another has been able to take up the slack.

From Barron's

The rotation so far suggests that major indexes like the S&P 500 can in fact stomach some weakness in major tech names, as long as stocks in other sectors can pick up the slack.

From MarketWatch

The AI trade may be in the doldrums, but banks are suddenly picking up the slack.

From Barron's

Some economists said the revisions indicate there is less spare capacity, or slack, in the economy than previously believed.

From The Wall Street Journal