Somebody who is ordinary. If you are basic, you usually like something if it is popular and everybody else likes it.
Oh my gosh, Kaitlyn is so basic!
A prison that kids are forced to go to for 11-12 years. You do useless work and learn things that you will never need to know in life. School days are incredibly long, some lasting 8 hours.
I'm off to school today, see you in 8 hours!