<p><strong>Noun</strong></p><ul><li>the portion of a watch or clock that measures beats and controls the speed of the going train</li><li>a mechanism for regulating the motion of a typewriter carriage, consisting of pawls and a toothed wheel or rack</li><li>a mechanism in a piano that causes a hammer to fall back into rest position immediately after striking a string</li><li>an act of escaping</li><li>Archaic: a way of escape; outlet</li></ul>