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.
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.
n. - A shutter, as for a channel for molten metal.
v. i. - To move backwards and forwards, like a shuttle.