If something exhausts you, it makes you so tired, either physically or mentally, that you have no energy left.

If you exhaust something such as money or food, you use or finish it all.

If you have exhausted a subject or topic, you have talked about it so much that there is nothing more to say about it.

The exhaust or the exhaust pipe is the pipe which carries the gas out of the engine of a vehicle.

Exhaust is the gas or steam that is produced when the engine of a vehicle is running.