An earring is jewelry you wear on your ear. Your favorite earrings might be tiny white pearls, or they might be long feathers that dangle to your shoulders.
An earring is also any kind of ring, stud, hoop, or dangling decoration that you clip on your earlobe or hook through a hole pierced in your ear.
Many people wear two matching earrings, one in each lobe, although others have just one pierced ear and wear a single earring — and some have multiple piercings in which they can wear a variety of earrings. In the 18th century, an earring that dangled was called an ear-drop.