a great multitude assembled; a crowd; a throng; -- said especially of fish; as, a shoal of bass.-to assemble in a multitude; to throng; as, the fishes shoaled about the place.-having little depth; shallow; as, shoal water.-a place where the water of a sea, lake, river, pond, etc., is shallow; a shallow.-a sandbank or bar which makes the water shoal.-to become shallow; as, the color of the water shows where it shoals.-to cause to become more shallow; to come to a more shallow part of; as, a ship shoals her water by advancing into that which is less deep.