<p><strong>Noun</strong></p><ul><li>a strong, wavelike, forward movement, rush, or sweep: the onward surge of an angry mob.</li><li>a strong, swelling, wavelike volume or body of something: a billowing surge of smoke.</li><li>a sudden, strong increase or burst: a surge of energy; surges of emotion.</li><li>Military: a significant increase in the number of troops deployed to an area.</li><li>the rolling swell of the sea.</li><li>the swelling and rolling sea: The surge crashed against the rocky coast.</li><li>a swelling wave; billow.</li><li>Meteorology: a widespread change in atmospheric pressure that is in addition to cyclonic and normal diurnal changes.</li><li>storm surge.</li><li>Electricity: a sudden rush or burst of current or voltage.</li><li>a violent oscillatory disturbance.</li><li>Nautical: a slackening or slipping back, as of a rope or cable.</li><li>Machinery: an uneven flow and strong momentum given to a fluid, as water in a tank, resulting in a rapid, temporary rise in pressure.</li><li>pulsating unevenness of motion in an engine or gas turbine.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>(of a ship) to rise and fall, toss about, or move along on the waves: to surge at anchor.</li><li>to rise, roll, move, or swell forward in or like waves: The sea surged against the shore. The crowd surged back and forth.</li><li>to rise as if by a heaving or swelling force: Blood surged to his face.</li><li>Electricity: to increase suddenly, as current or voltage.</li><li>to oscillate violently.</li><li>Nautical: to slack off or loosen a rope or cable around a capstan or windlass.</li><li>to slip back, as a rope.</li><li>Machinery: to move with pulsating unevenness, as something driven by an engine or gas turbine.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to cause to surge or roll in or as in waves.</li><li>Nautical: to slacken (a rope).</li></ul>