- 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[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. Slacken off the ropes.
BrE BrE//ˈslækən//; NAmE NAmE//ˈslækən//Verb Forms present simple I / you / we / they slacken
BrE BrE//ˈslækən//; NAmE NAmE//ˈslækən//he / she / it slackens
BrE BrE//ˈslækənz//; NAmE NAmE//ˈslækənz//past simple slackened
BrE BrE//ˈslækənd//; NAmE NAmE//ˈslækənd//past participle slackened
BrE BrE//ˈslækənd//; NAmE NAmE//ˈslækənd//-ing form slackening
BrE BrE//ˈslækənɪŋ//; NAmE NAmE//ˈslækənɪŋ//