Roof

1. The exterior surface and its supporting structures on the top of a building. We had to repair the roof of our home when it began to leak water.
2. The top covering of something. It is unsafe to ride on the roof of a car.
3. The highest point of limit. We must set a roof on the price of our product.
4. To become extremely angry. When I told her about the damage I caused she went through the roof.