A "teen" refers to a person who is in their teenage years, typically between the ages of 13 and 19. This stage of life is characterized by significant physical, emotional, and social changes as individuals transition from childhood to adulthood. Teens often experience a desire for independence and may begin to form their own identities. During the teenage years, individuals may engage in various activities such as attending school, participating in sports, and forming friendships. This period is also marked by exploration of interests, including music, art, and technology, as teens seek to understand themselves and their place in the world.