Curly describes hair that grows in spirals, loops, or waves instead of hanging straight down. When someone has curly hair, it might form tight ringlets that bounce when they move, loose waves that flow over their shoulders, or coils that spring back when gently pulled.

Hair texture comes from the shape of the hair follicle, the tiny opening in your skin where each strand grows. Round follicles tend to produce straight hair, while oval or ribbon-shaped follicles create curls. People with curly hair often need different care than those with straight hair: special shampoos, gentle brushing, and sometimes products to help define their curls and prevent frizz.

The word can describe other things that spiral or wind: curly ribbons on a birthday present, curly fries at a restaurant, or even the curly tail of a pig. When something is described as curly, it has that characteristic spiral or coiled shape rather than being straight or flat.