An Escapement is the precision mechanism within a mechanical clock or watch that regulates the release of energy from the mainspring or weight-driven movement, allowing the timepiece to keep accurate time. Developed in various forms over the centuries---including verge, anchor and deadbeat escapements---it is considered one of the most important innovations in horology. The design and quality of an escapement often indicate the age, accuracy and sophistication of an antique clock. *Related Terms*\ Anchor Escapement, Clock Movement, Deadbeat Escapement, Fusee, Pendulum, Verge Escapement.