Lock

src: cdn.small.masterlock.com

Lock may refer to:

Video Lock

Lock (security device), a mechanical device used to secure items of importance.
Lock of hair, a tuft or small bundle of hair
Lock (water navigation), a device for boats to transit between different levels of water
Lock (weapons guidance), missile navigation system's target acquisition fix
Lock (firearm), the ignition mechanism of small arms
Lock (rugby league), a player position in rugby league
Lock (rugby union), a player position in rugby union
Fermentation lock, a device in beer and wine making that allows carbon dioxide to escape while not allowing air to enter
Lock, a number of grappling holds in wrestling, judo and other martial arts, e.g. armlock, leglock
Rope lock, a device used in theater fly systems
Lock (waltz), a dance figure

File locking, describes a mechanism that restricts access to a computer file
Lock (computer science), a bookkeeping object used to serialize concurrent access
Lock (database), a feature used when multiple users access a database concurrently
SIM lock, a restriction on mobile phones to work only in certain countries or with certain providers

src: cdn.small.masterlock.com

src: cdn.small.masterlock.com

Lock (surname)
Ormer Locklear (1891-1920), American stunt pilot and film actor nicknamed "Lock"
Lock Martin (1916-1959), stage name of American actor Joseph Lockard Martin, Jr., best known for playing the robot Gort in the film The Day the Earth Stood Still

src: images-na.ssl-images-amazon.com

Lock (film), a 2016 Punjabi film
Lock (Saga of the Skolian Empire), a sentient machine in the novels by Catherine Asaro