Swell

(swèl.) [From Icel. sv ell a, to expand.] (Naut.) The heaving motion caused by a succe ion of waves or billows; when coming after a gale or storm, such perturbation of the sea is termed a ground-swell.-(Mus.) A gradual increase and decrease of the crescendo and diminuendo respectively: - marked in musical scores thus: . [s. 871]