Teens are people between the ages of thirteen and nineteen. Once you turn twenty, you're no longer a teenager.

The teenage years mark a time of dramatic change. Teens grow taller, their voices might change, and their bodies develop from child to adult. They also gain new freedoms and responsibilities: learning to drive, getting jobs, and making more of their own decisions. Friendships become intensely important during these years, and teens often care deeply about what their peers think.

The word teen can describe anything related to this age group. A teen movie focuses on teenage characters and their concerns. Teen fashion refers to styles popular with this age group. Parents sometimes talk about their teenage son or teenage daughter.

Being a teenager means standing between childhood and adulthood. Teens have more independence than younger kids but aren't quite adults yet. They're figuring out who they are, what they believe, and what kind of person they want to become. It's a period of growth, discovery, and sometimes confusion as they navigate this in-between stage of life.