1.
If you ~ the road or path you are going along, you start going along a different road or path which leads away from it.
The truck turned off the main road along the gravelly track which led to the farm...
He turned off only to find he was trapped in a town square with no easy exit.
PHRASAL VERB: V P n (not pron), V P
2.
When you ~ a piece of equipment or a supply of something, you stop heat, sound, or water being produced by adjusting the controls.
The light’s a bit too harsh. You can turn it off...
I have to get up and ~ the radio...
= switch off
? turn on
PHRASAL VERB: V n P, V P n (not pron)
3.
If something turns you off a particular subject or activity, it makes you have no interest in it.
What turns teenagers off science and technology?...
Teaching off a blackboard is boring, and undoubtedly turns people off.
PHRASAL VERB: V n P n, V n P, also V P n (not pron)
see also turn-off
4.
If something or someone turns you off, you do not find them sexually attractive or they stop you feeling sexually excited. (INFORMAL)
Aggressive men turn me off completely.
? turn on
PHRASAL VERB: V n P, also V P n (not pron)
see also turn-off