 |
| |||||||||
slack‧en
[intransitive and transitive] written
[intransitive and transitive] written1 also slacken off to gradually become slower, weaker, less active etc, or to make something do this : 
The heavy rain showed no signs of slackening off.
The heavy rain showed no signs of slackening off.2 to make something looser, or to become looser [≠ tighten]: He did not let her go, but his grip on her slackened.
He did not let her go, but his grip on her slackened.
