Meaning
To turn a machine or light on.
Example Sentence
"It's getting dark, can you switch on the lamp?"
Synonyms
turn on
activate
power up
Usage Note
This phrasal verb is separable. When using a noun object, it can go between the verb and particle or after the particle. When using a pronoun object, it must go between the verb and particle (e.g., "turn it off" not "turn off it").