(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.

plural of locking room

present participle of lock lips

present participle of core lock

A thixotropic liquid applied to screw threads that keeps them from loosening.

plural of thread-locking fluid

To inadvertently prevent (a person, particularly oneself) from entering a place, by leaving it locked. / (computing) To prevent from accessing a data structure.

(business, economics) An event in which an employer bars employees from working as a tactic in negotiating terms of employment, particularly in response to a strike or threat to strike.

A lock situated between an enclosed basin or a canal and the tide water of a harbor or river, when they are on different levels, so that craft can pass either way at all times of the tide

(firearms) The time, usually measured in milliseconds, from when the trigger is pulled until the firing pin strikes the primer.