turn%20on

verb

1. 1

   To set a flow of fluid or gas running by rotating a tap or valve.

   “Turn on the tap”

2. 2

   To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.).

   “Please turn on automatic updates.”

3. 3

   (of a device) To start operating; to power up, to become on.

   “My computer won't turn on.”

4. 4

   To fill with enthusiasm; to intoxicate, give pleasure to ( + to an object of interest or excitement).

   “Attractive packaging can turn buyers on to a product.”

5. 5

   To sexually arouse.

6. 6

   To cause to take up drugs, especially hallucinogens.

7. 7

   To violently rebel against; to suddenly attack (this is the intransitive verb turn, with on functioning as a preposition not as an adverbial particle).

   “Suddenly all his friends turned on him.”

8. 8

   To depend upon; to pivot around, to have as a central subject (this is the intransitive verb turn, with on functioning as a preposition not as an adverbial particle).

   “The argument turned on the question of whether or not jobs would be lost.”