A "cousin" is a relative who shares a common ancestor with you, typically the child of your aunt or uncle. Cousins can be close in age, making them great playmates during childhood. They often share family gatherings, holidays, and special moments, creating lasting memories together. There are different types of cousins, such as first cousins, who share the same grandparents, and second cousins, who share the same great-grandparents. Some people also have cousins by marriage, which means they are related through a spouse. Regardless of the type, cousins often play an important role in family dynamics and relationships.