Added 10 October 2026 slacking noun Categories: ActionsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about slacking at Wordnik → Where our words come from → The evasion of work or duty. Related Words: goldbrickingshirkingsoldieringslackerslackerslazinessslackeningsluggishslackenedslumping Back to today's word