To rise and fall, as a ship on the waves; especially, to ride near the shore; ride at anchor.To rise high and roll, as waves: literally or figuratively.Nautical: To slip back: as, the cable surges.To let go a piece of rope suddenly; slack a rope up suddenly when it renders round a pin, a winch, windlass, or capstan.n. A spring; a fountain; a source of water.n. A large wave or billow; a great rolling swell of water; also, such waves or swells collectively: literally or figuratively.n. The act of surging, or of heaving in an undulatory manner.n. In ship-building, the tapered part in front of the whelps, between the chocks of a capstan, on which a rope may surge.n. Any change of barometric level which is not due to the passage of an area of low pressure or to diurnal variation.In electricity, to oscillate violently: said of oscillatory rushes of current.To cause to rise and swell forth with a billowy motion.n. In electricity, a sudden rush of current; specifically, the violent oscillations which may occur in alternating-current circuits when the conditions for resonance are fulfilled, or which may be set up in conductors by the inductive action of lightning.