American English

Definition of slacken verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they slacken
    he / she / it slackens
    past simple slackened
    -ing form slackening
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  1. 1[intransitive, transitive] to gradually become, or to make something become, slower, less active, etc. synonym relax slacken (off) We've been really busy, but things are starting to slacken off now. slacken something She slackened her pace a little (= walked a little more slowly).
  2. 2[intransitive, transitive] to become or to make something become less tight synonym loosen His grip slackened and she pulled away from him. slacken something He slackened the ropes slightly.
See the Oxford Advanced Learner's Dictionary entry: slacken