Surge  —n. 1 sudden rush. 2 heavy forward or upward motion. 3 sudden increase in price, activity, etc. 4 sudden increase in voltage of an electric current. 5 swell of the sea. —v. (-ging) 1 move suddenly and powerfully forwards. 2 (of an electric current etc.) Increase suddenly. 3 (of the sea etc.) Swell. [latin surgo rise]