When an object such as a ball bounces or when you bounce it, it moves upwards from a surface or away from it immediately after hitting it.

The bounce of a sports field is the condition of it, which determines how high a ball will bounce on it.

If sound or light bounces off a surface or is bounced off it, it reaches the surface and is reflected back.

If something bounces or if something bounces it, it swings or moves up and down.

If you bounce on a soft surface, you jump up and down on it repeatedly.

If you bounce a child on your knee, you lift him or her up and down quickly and repeatedly for fun.

If someone bounces somewhere, they move there in an energetic way, because they are feeling happy.

If you bounce your ideas off someone, you tell them to that person, in order to find out what they think about them.

If someone bounces you into doing something you do not really want to do, they make you do it, usually by starting a process which cannot easily be stopped.

If a cheque bounces or if a bank bounces it, the bank refuses to accept it and pay out the money, because the person who wrote it does not have enough money in their account.

If an e-mail or other electronic message bounces, it is returned to the person who sent it because the address was wrong or because of a problem with one of the computers involved in sending it.