1. deadbolt - Noun
2. deadbolt - Verb
the part of a lock that is engaged or withdrawn with a key
Source: WordNetNeedless to say that your best defense in this regard are doors that are secured with a heavy-duty deadbolt. Source: Internet
On top of that, some smart locks require you to completely replace your deadbolt with an entirely new system, which is often a big no no for renters or people who are part of an HOA. Source: Internet
With a black-market LockAid lock-release gun legally sold only to law-enforcement agencies, Jane defeated the deadbolt on the back door. Source: Internet
• Instal deadbolt locks on all your doors. Source: Internet
The ordinary-looking Shepherd Lock turns your existing deadbolt into a touch entry lock using a touch sensor. Source: Internet
If you have the money to buy those expensive ones, then opt for the biometric deadbolt lock. Source: Internet