switch off phrasal verb ( see also ↑ switch )
1 . to turn off a machine, light, radio etc using a switch
switch something ↔ off
The burglar alarm was switched off.
Don’t forget to switch off before you go.
2 . informal to stop listening to someone:
He just switches off and ignores me.
3 . to relax for a short time:
Switch off by listening to music.