The term 'diagonal-weave fabric' refers to a type of fabric that is woven in a diagonal pattern. The fabric is made by interlacing two sets of yarns at an angle, creating a unique texture and look. The term 'serge' is a type of diagonal-weave fabric that is usually made from wool or cotton. It is often used for making suits, jackets, and other garments. Serge is also used for upholstery and drapery fabrics.