• To be supported by water or other fluid; not to sink; to float; as, any substance will swim, whose specific gravity is less than that of the fluid in which it is immersed. • To move progressively in water by means of strokes with the hands and feet, or the fins or the tail. • To be overflowed or drenched. • Fig.: To be as if borne or floating in a fluid. • To be filled with swimming animals. • To pass or move over or on by swimming; as, to swim a stream. • To cause or compel to swim; to make to float; as, to swim a horse across a river. • To immerse in water that the lighter parts may float; as, to swim wheat in order to select seed. • The act of swimming; a gliding motion, like that of one swimming. • The sound, or air bladder, of a fish. • A part of a stream much frequented by fish. • To be dizzy; to have an unsteady or reeling sensation; as, the head swims.