Corduroy is a thick fabric with ridges or ribs running along its length. You can use corduroy to make clothing or to upholster furniture.
The fabric known as corduroy is most famously used to make the jean-style pants also known as corduroys. The pattern on a piece of corduroy is called a "cord," the ridges that distinguish corduroy from its close relative, velvet. Another kind of corduroy is an often temporary road that's laid with many logs in a row — corduroy roads have been used during wars to bridge swampy areas quickly.