English · Daily Life
turn on
/tɜːrn ɒn/
[/tɜːrn ɒn/]
start a device
Beginnerverb
Definition
To start a machine, light, or appliance by operating a switch or control. It is the opposite of turn off.
Example
Please turn on the lights, it's getting dark.
Please turn on the lights, it's getting dark.
Etymology
From 'turn' (to rotate) plus 'on', originally describing rotating a valve or knob to the on position.
How & Where It’s Used
Used very commonly in everyday speech for switching on devices.