<p><strong>Noun</strong></p><ul><li>abatement or relief from bodily or mental work, effort, application, etc.</li><li>an activity or recreation that provides such relief; diversion; entertainment.</li><li>Synonyms: pleasure, amusement, fun.</li><li>a loosening or slackening.</li><li>diminution or remission of strictness or severity.</li><li>Mathematics: a numerical procedure for solving systems of equations by successive approximations of the variables.</li><li>Physics: the return of a system undergoing dissipation to an initial state of equilibrium after being displaced from it.</li><li>the approach to steady-state operation of a system that has undergone dissipation and a change in state or has been subjected to an abrupt periodic disturbance.</li></ul>