To flip or rotate something so that the other side is facing up or out. She turned over the pancake to cook the other side.
To transfer control or responsibility to someone else. He turned over the project to his assistant before going on vacation.
To change position by rolling or flipping, especially in bed. I turned over in bed to get more comfortable.
To generate a certain amount of business or revenue. The company turns over a million dollars annually.
To start the engine of a vehicle. The car wouldn't turn over on the cold morning.