Added 9 October 2026 deadbolt /ˈdɛdˌboʊ̯lt/ noun Categories: ThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about deadbolt at Wordnik → Where our words come from → The part of a lock that is engaged or withdrawn with a key. Related Words: boltbladebittinghecktailpiecekeeperlimbdetentbible Back to today's word