(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.