Meanings
How to pronounce "turn on":
To set a flow of fluid or gas running by rotating a tap or valve.
Example: "Turn on the tap"
To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.).
Example: "Please turn the lights on so I can see what I'm reading."
Example: "Please turn on automatic updates."
To start operating; to power up, to become on.
Example: "My computer won't turn on."
To introduce (someone to something), and especially to fill them with enthusiasm (about it); to intoxicate, give pleasure to ( + to an object of interest or excitement).
Example: "Attractive packaging can turn buyers on to a product."
Example: "Attractive showroom models can turn buyers on."
Example: "Hearing that song turned me on to jazz fusion."
To sexually arouse.