Definition: Sequin, or sequin, is a type of synthetic fabric made from a mixture of nylon and polyester fibers. It is often used to create patterns and designs that are similar to those found in sequins. The term "sequined" refers to the fact that sequins can be made from a variety of materials, including synthetic fabrics like sequins. The process involves mixing synthetic fibers with natural fibers or other non-synthetic materials, which creates a fabric that is both lightweight and flexible.