(1):
(v. i.) To move backwards and forwards, like a shuttle.
(2):
(n.) A shutter, as for a channel for molten metal.
(3):
(n.) The sliding thread holder in a sewing machine, which carries the lower thread through a loop of the upper thread, to make a lock stitch.
(4):
(n.) An instrument used in weaving for passing or shooting the thread of the woof from one side of the cloth to the other between the threads of the warp.