An example of a teenager is someone who just has their thirteenth birthday.
The moody teenager was back.
He seemed like a normal teenager, harmless with a name like Jonny.
They are close to being equal, with the exception that Jonny is a teenager and can't control his power yet.
She couldn't get over seeing a grown man acting like a teenager.
She'd watched him go from a near-comatose state, through his teenager stage that nearly drove them all mad, to the gym-obsessed warrior trying to understand his place in the world.