switch on

Từ điển Oxford Advanced Learner 8th

ˌswitch ˈoff/ˈon | ˌswitch sthˈoff/ˈon derived
to turn a light, machine, etc. off/on by pressing a button or switch
•Please switch the lights off as you leave.
•How do you switch this thing on?
•The electricity has been switched off.
•We only switched on halfway through the programme.
Main entry: ↑switch_derived