(1):
(n.) A similar instrument, commonly of tin, used by boys for discharging paper wads and other light missiles.
(2):
(n.) A long wrought iron tube, on the end of which the workman gathers a quantity of "metal" (melted glass), and through which he blows to expand or shape it; - called also blowing tube, and blowpipe.
(3):
(n.) A blowgun.