FluentPlex

slack

/slæk/ adjective C1
  1. Lax; not tense; not firmly extended. · a slack rope
  2. Weak; not holding fast. · a slack hand
  3. Moderately warm. · a slack oven
  4. Moderate in speed. · a slack wind
  5. Lacking diligence or care; not earnest or eager. · slack in duty or service
  6. Not active or busy, successful, or violent. · Business is slack.· the slack period following the main tourist season
  7. Excess; surplus to requirements. · the slack capacity of an oil pipeline
  8. Vulgar; sexually explicit, especially in dancehall music. (slang)

Comparative slacker · Superlative slackest

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From the library

They were paying a pound a day each—fourteen pounds a week, and this is the slack season.
A Study in Scarlet, p. 62 · B2
“He said that we were slack about such matters—that it would be easy for a traitor to get the plans.”
Sherlock Holmes: The Bruce-Partington Plans, p. 19 · B2
“I was going to say that my practice could get along very well for a day or two, since it is the slackest time in the year.”
The Memoirs of Sherlock Holmes, p. 76 · B2

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.