The document defines various textile and fabric terminology:
Warp refers to the lengthwise yarns in a woven fabric that are held tension on a loom. Weft is the transverse yarns that are drawn through the warp. Weaving involves interlacing two sets of yarns at right angles to form cloth. A loom is a device used to hold the warp yarns under tension during weaving. A heddle separates warp threads for the passage of the weft. Thread count measures the density of threads in fabric.