A bolt designed for attachment to the bottom of a door. Usually the bolt is controlled by a trigger, which holds the bolt against a spring. Release of the trigger permits the spring to move the bolt into the unlocked position.

(n.) A bolt mechanism typically mounted at the bottom of a door, and designed to be easily operated by ones foot. Source: Lock Industry Standards and Training (LIST) Council

A type of bolt applied at the bottom of a door and arranged for foot operation. Generally the bolt head is held up by a spring when the door is unbolted.

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.