A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.
Phrasal Verb:
settle down
Meaning / Example:
1. to calm down. > Now, children, it's time to settle down and start class. > If you don't settle down, I'll send you all home.
2. to settle into a stable way of life; to get married and settle into a stable way of life. > Tom, don't you think it's about time you settled down and stopped all of this running around?