Corduroy is a type of FABRIC that is composed of a series of wales, or ridges, that are RIBBED and run vertically down the material. The term 'waled' refers to the width of the ridges, which can range from very fine to very wide. The term 'RIDGE' is used to describe the raised portion of the FABRIC, while 'RIBBED' is used to describe the pattern of the ridges. Corduroy is a durable and comfortable FABRIC that is often used to make clothing, upholstery, and other items.