A loom is a device used to weave cloth. The basic purpose of any loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics may vary, but the basic function is the same. Weaving » See Weaving for more information. See Textile manufacturing terminology for more terms connected with looms. Weaving is done by intersecting the longitudinal threads, the warp, for example "that which is thrown across", with the tr… (More on Loom)