turn off
US /tɜːrn ɔːf/
UK /tɜːrn ɔːf/

1.
to stop the operation or flow of something by means of a switch, button, or other control
:
•
Please turn off the lights when you leave.
•
Don't forget to turn off your phone during the movie.
2.
to stop the operation or flow of something by means of a switch, button, or other control