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English definition of “slack”

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slack

adjective [-er/-est only]  /slæk/ us  

slack adjective [-er/-est only] (NOT TIGHT)

not tight; loose: His jaw went slack, and he looked puzzled.

slack adjective [-er/-est only] (NOT ACTIVE)

showing a lack of activity; not busy or happening in a positive way: The teachers are kind of slack about enforcing rules.

slack

noun [U]  /slæk/ us  

slack noun [U] (LOOSE STATE)

the state of being too loose or not tight enough: There was too much slack in the cable.

slack noun [U] (SLOW STATE)

a period when something is slower or less active than usual: the midsummer slack
(Definition of slack from the Cambridge Academic Content Dictionary © Cambridge University Press)
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