double-lock
Two-mechanism fastening system
Double-lock means to lock with two turns of the key or with two separate locking mechanisms, providing extra security.
Many deadbolts require two rotations to fully engage: Make sure you double-lock the door when you leave.
The term also applies figuratively to anything secured with redundant safeguards.
Key-operated door lock
- tumblerFlat-bottomed drinking vessel
- keyholeOpening for a lock
- cylinderCircular-based solid form
- latchDoor-securing catch
bolt · hasp · padlock · shackle · lever · cam · ward · escutcheon
Secure storage chamber
- alarmUrgent warning signal
- surveillanceSystematic observation of subjects
- CCTVSurveillance camera network
- guardWatchful defensive attention
patrol · sensor · biometrics · gate · barrier · fence · monitoring · firewall
Automatic harm prevention mechanism
- backupStored duplicate for recovery
- two-stageOccurring in two steps
- secondaryLesser in rank
- belt-and-suspendersRedundant precaution strategy
Secured container for valuables
- valuablesPossessions of significant worth
- jewelryOrnamental personal accessories
- heirloomsObjects passed through family lines
- documentsFormal written records
steel · armored · fireproof · combination · cash · confidential · protected · impenetrable
Resistant to young hands
- anti-theftDesigned to deter stealing
- fobChain-attached bauble
- remoteDistant or controller
- automaticOperating without intervention
deadbolt
Key-operated door lock
latch · bolt · hasp · padlock · shackle · lever · cam · ward · escutcheon · spindle
vault
Secure storage chamber
- alarmUrgent warning signal
- surveillanceSystematic observation of subjects
- CCTVSurveillance camera network
guard · patrol · sensor · biometrics · gate · barrier · fence · monitoring · firewall · encryption
fail-safe
Automatic harm prevention mechanism
strongbox
Secured container for valuables
- valuablesPossessions of significant worth
- jewelryOrnamental personal accessories
- heirloomsObjects passed through family lines
documents · steel · armored · fireproof · combination · cash · confidential · protected · impenetrable
childproof
Resistant to young hands
- anti-theftDesigned to deter stealing
- fobChain-attached bauble
- remoteDistant or controller