English definition of “turn”
MOVE YOUR BODY [I] › to move your body so that you are facing a different direction: Ricky turned and saw Sue standing in the doorway.
CHANGE DIRECTION [I, T] › to change direction when you are moving, or to make a car do this: Turn left at the traffic lights. I turned the car into the drive.
CHANGE POSITION [T] › to move something round so that it faces a different direction: Ella turned the cup to hide the crack in it.
GO ROUND [I, T] › to move around a central point in a circle, or to make something do this: Turn the steering wheel as quickly as you can.
turn blue/cold/sour, etc › to become blue, cold, etc: The sky turned black and it started to rain.
turn 16/21, etc › to become a particular age: He turned 18 last May.