<p><strong>Noun</strong></p><ul><li>a state of rest or balance due to the equal action of opposing forces.</li><li>Synonyms: steadiness, stability, equipoise.</li><li>equal balance between any powers, influences, etc.; equality of effect.</li><li>mental or emotional balance; equanimity: The pressures of the situation caused her to lose her equilibrium.</li><li>Chemistry: the condition existing when a chemical reaction and its reverse reaction proceed at equal rates.</li></ul>