0 past simple and past participle of turn
1 to (cause to) move in a circle around a fixed point or line:
2 to (cause to) change the direction in which you are facing or moving:
She turned to face him.
He turned round and waved to us.
He turned on his heel (= turned quickly to face the opposite direction) and left the room.
The person on my left turned to me and whispered "Not another speech!"
His wife tried to speak to him, but he turned his back (on her)/turned away (from her) (= moved so that his back, not his face, was towards her to show his anger).
At about three o'clock, the tide started to turn (= the sea started to come closer to or move away from the beach).
I'll just turn the car round and go back the way we came.
We watched until the car had turned (= gone around) the corner.
The army turned their guns on (= pointed them at and started to shoot at) the protesters.
She can turn (= perform) a somersault.
3 to move, or to move an object or page, so that a different side or surface is on the top:
4 to (cause to) become, change into, or come to be something:
The mood of the meeting turned solemn when the extent of the problem became known.
The companies worked well together for a while, but eventually the relationship turned sour (= became bad).
Keele, pop star turned business tycoon, has launched a new range of cosmetics.
By the end of September, the leaves have started to turn (= become brown).
Her attitude turned from politely interested to enthusiastic during the course of our conversation.
She turned 18 last year.
It's just turned ten o'clock.
5 to use a control to switch a piece of equipment or a power or water supply on or off, or to increase or reduce what it is producing:
6 to damage the muscles in the foot by suddenly twisting it too strongly:
7 to shape a piece of wood while it is attached to a machine that spins it:
a turned bowl
There was no air conditioning, just a ceiling fan turning slowly.
We watched as the sails of the windmill slowly started to turn.
When this wheel turns, it makes those big stones turn which grind the grain into flour.
Follow the road for two kilometres, then turn left.