Word.ws English Dictionary

slackest

slackest is the superlative form of slack.

Meaning of slack

Adjective

slack (comparative slacker, superlative slackest)

  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.
    Synonyms:
    slow, moderate, easy

See all 28 meanings of slack

Questions about slackest

What is slackest the superlative form of?
Slackest is the superlative form of slack.

Words near slackest in the dictionary

  1. slackerishly
  2. slackerism
  3. slackerly
  4. slackers
  5. slackery
  6. slackest
  7. slackful
  8. slackhanded
  9. slackhandedness
  10. slacking
  11. slacking off

Source and license

Adapted from Wiktionary: slackest (page history and authors); slack (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “slackest.” Word.ws, https://word.ws/slackest. Based on Wiktionary, CC BY-SA 4.0.