Meaning
To deactivate or stop a device, light, or machine.
Example Sentence
"Don't forget to turn off the computer before you leave."
Synonyms
switch off
shut off
power down
deactivate
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").