(computing) A lock key that toggles the behaviour of the function keys between their traditional (application-defined) behaviours and a set of new commands.

A type of lock (for knives, and other tools, of folding or collapsing type) in which the lock is released with the press of a button, usually on the side of the handle; such a lock often allows the tool to be locked closed as well as locked open.

(engineering) That remains safely in place after being moved or positioned.

simple past tense and past participle of box and lock

present participle of box and lock

To suppress or hide (something) so that it is not readily available or capable of action. / Used other than figuratively or idiomatically: see box, lock.

(aviation) A device used to lock the control surfaces of a parked aircraft in order to reduce the probability of flight-control damage resulting from strong or gusty winds.

simple past tense and past participle of lock and load

present participle of lock and load

(rail transport) A room in a signal box, usually at ground level beneath the operating room, containing the interlocking mechanism for signals and points (track switches) below the lever frame in the operating room.