n. One who swims.n. An animal which is well adapted for swimming, or which swims habitually.n. A protuberance on the leg of a horse.n. Something that swims or floats or is used as a float.n. In brewing, a metallic vessel floated on the wort in a fermenting-tun, and used to hold ice or iced water for absorbing the heat produced by the fermentation.n. A swimming-bladder.n. The light bag, usually cigar-shaped or fish-shaped, within an open net of cords, which incloses buoyant gas and is employed to support the machinery and crew of a dirigible balloon.