A person begins their teenage life when they become 13 years old, and ends when they become 20 years old. Teenagers who are 18 and 19 years old are, in most nations, both teenagers and adults. The way the word is used varies. Most societies have rites of passage to mark the change from childhood to adulthood.

Is 13 a teenager or tween?

The definition of a teen is pretty straight forward: a teen is a person between the ages of 13 and 19. The tween definition is a little less clear cut when you're asking “what age is a tween”. There is no official tween definition.

Is a 11 year old still a kid?

A tween is a child between the ages of 9 and 12. A tween is no longer a little child, but not quite a teenager.