A "deadbolt" is a type of lock that is more secure than a regular lock because it has a thicker metal bolt that is activated with a key or thumbturn, making it difficult for someone to force open. Full definition
Residents are strongly advised to secure homes with deadbolt locks on all external doors and to install windows that can be securely locked. (trustedchoice.com)
If you secure your doors with deadbolt locks, and install a burglar alarm, you can lower that cost to $ 510. (netquote.com)
The smart deadbolt on offer, called the Chek, boasts a major new feature over its predecessor in the form of its ability to tell whether the lock is currently engaged. (androidheadlines.com)