• To grow larger; to dilate or extend the exterior surface or dimensions, by matter added within, or by expansion of the inclosed substance; as, the legs swell in dropsy; a bruised part swells; a bladder swells by inflation. • To increase in size or extent by any addition; to increase in volume or force; as, a river swells, and overflows its banks; sounds swell or diminish. • To rise or be driven into waves or billows; to heave; as, in tempest, the ocean swells into waves. • To be puffed up or bloated; as, to swell with pride. • To be inflated; to belly; as, the sails swell. • To be turgid, bombastic, or extravagant; as, swelling words; a swelling style. • To protuberate; to bulge out; as, a cask swells in the middle. • To be elated; to rise arrogantly. • To grow upon the view; to become larger; to expand. • To become larger in amount; as, many little debts added, swell to a great amount. • To act in a pompous, ostentatious, or arrogant manner; to strut; to look big. • To increase the size, bulk, or dimensions of; to cause to rise, dilate, or increase; as, rains and dissolving snow swell the rivers in spring; immigration swells the population. • To aggravate; to heighten. • To raise to arrogance; to puff up; to inflate; as, to be swelled with pride or haughtiness. • To augment gradually in force or loudness, as the sound of a note. • The act of swelling. • Gradual increase. • Increase or augmentation in bulk; protuberance. • Increase in height; elevation; rise. • Increase of force, intensity, or volume of sound. • Increase of power in style, or of rhetorical force. • A gradual ascent, or rounded elevation, of land; as, an extensive plain abounding with little swells. • A wave, or billow; especially, a succession of large waves; the roll of the sea after a storm; as, a heavy swell sets into the harbor. • A gradual increase and decrease of the volume of sound; the crescendo and diminuendo combined; -- generally indicated by the sign. • A showy, dashing person; a dandy. • Having the characteristics of a person of rank and importance; showy; dandified; distinguished; as, a swell person; a swell neighborhood.