Definition: Cotton is probably one of the most common fabrics you're likely to have in your home as clothing. Cotton is a natural fiber and is used in a wide variety of clothing and home furnishings. Cotton is easily washed and/or dry cleaned. Cotton is a good strong fabric that is absorbent, and easy to work with. Cotton has a tendency to wrinkle very easily, so cotton/polyester blends began to be popular. Many people prefer the year-round "breathing" and lack of pilling of one hundred percent cotton.