Added 9 October 2026 fastener /ˈfɑːsənə/ noun Categories: PeopleThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about fastener at Wordnik → Where our words come from → A person who fastens or makes fast. he found the door fastened and wondered who the fastener was Restraint that attaches to something or holds something in place. Related Words: holdfastclasphasplatchpinboltpackagingdetentpawlclipsnapflash Back to today's word