switch on phrasal verbphr v SWITCH ON OR OFFto turn on a machine, light, radio etc using a switch 〔用开关〕开，打开switch something ↔ on He switched the torch on. 他打开了手电筒。
5 When a tape is put in the VCR, it switches on automatically .录像带放进录像机后，它会自动播放。
n The lights switch on automatically when it gets dark.
switch on• Do you mind if I switch the light on?• Exhaust fumes come into the car when I switch on the air conditioner.• I switched on the radio to listen to the news.• Will you switch on the television?
→ switch on at switch1(2)