1. plural of deadbolt; heavy-duty locks that slide a solid metal bolt into the door frame for extra security

Examples

• The apartment has deadbolts on both the front and back doors.
• She installed new deadbolts after the break-in.
• Make sure to turn the deadbolts before going to bed.
• The locksmith recommended high-quality deadbolts for better security.
• All the deadbolts in the building use the same master key.
• The deadbolts were so old they were difficult to turn.