noun A full or gently rounded shape or form. (the soft swell of her breast) A gradual increase in sound, amount, or intensity. (there was a swell of support in favor of him) A slow, regular movement of the sea in rolling waves that do not break. (there was a heavy swell) A mechanism for producing a crescendo or diminuendo in an organ or harmonium. (Most effective is the contrast created when Slean's piano-tinkling waltz-time verses bloom into symphonic swells of strings and timpani on the pop-smart choruses.) A person of wealth or high social position, typically one perceived as fashionable or stylish.