The inner groove on a vinyl record in the form of a closed loop, which traps the tonearm and needle, preventing it from entering the label area.

plural of locked groove

Alternative form of lockup

A kind of cast-iron padlock. / Used other than figuratively or idiomatically: see jail, lock.

plural of lock time

(automotive) A device that allows the front brakes to lock independently of the rear brakes via a switch.

(firearms) A kind of lock for a gun in which a hammer strikes upon a percussion cap on the nipple, igniting the charge.

(construction) a method of interlocking metal panels in which one panel edge is folded back on top of itself and the other panel is folded under, after which the two panels are hooked together.

(computing) A key on a standard extended keyboard, originally causing the arrow keys to scroll a window rather than moving a cursor, now sometimes used for other purposes.

A small amount of air in a pipe that stops liquid flowing through it.