The projecting member of a lock that is operated by key or turn-knob to positively lock a door, and usually is rectangular.
(a lock; is operated; by key or turn-knob) (The projecting member of a lock; to positively lock; a door) (The projecting member of a lock; to is; rectangular; T:usually)
a lock The projecting member of a lock The projecting member of a lock
is operated to positively lock to is
by key or turn-knob
a door
rectangular T:usually