A thesis statement focuses your ideas into one or two sentences. It should present the topic of your paper and also make a comment about your position in relation to the topic. Your thesis statement should tell your reader what the paper is about and also help guide your writing and keep your argument focused.
The definition of teen is something related to or characteristic of adolescents between age 13 and 19. A movie that caters to kids aged 14-19 is an example of a teen movie. Teen means an adolescent between age 13 and 19. A 14 year old boy is an example of a teen.
They are called teenagers because their age number ends with teen. Someone aged 18 or 19 is also considered a young adult. Usage by ordinary people varies, and also varies in different societies. Most societies traditionally had a formal ceremony to mark the change from childhood to adulthood.