Definition of: escapement

(ə·skāp′mənt, e·skāp′-) noun
1. Mech. A device used in timepieces for securing a uniform movement, consisting of an escape wheel and a detent or lock, through which periodical impulses are imparted to the balance wheel, to keep it in oscillation, and to which, in turn, motion is imparted by the return movement of the balance wheel actuated by a mainspring or a weight.
2. Obs. The act of escaping; an escape or a means of escape; a vent.
ESCAPEMENT OF A WATCH
a. Anchor.
l. Lever or fork.
ip. Impulse pallet.
lp. Locking pallet.
r. Roller.