if you switch on something such as a light or a machine, or if it switches on, you make it start working
Don’t switch on the light.
He bends to switch on the machine, the seat of his shorts stretching to frame his slim backside.
Stephanie removed her night-vision goggles and felt for the switch on the wall.
The machine switches on automatically.
Uncomfortably she sat up, throwing aside the pillow, and leaned across, groping for the switch on the bedside light.
switches on
switching on
switched on
There is no origin for this phrasal verb
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