n. a bolt mechanism typically mounted at the bottom of a door, and designed to be easily operated by ones foot forbidden zone n. on a combination lock dial, a range of marks within which the last item of the combination must not be set to provide for proper lock operation
A steel pin housed in a door bottom edge or astragal, with a latch mechanism, which can be driven down to project into a receiver socket or hole in the floor or threshold, to better secure the door when closed.