come on (2)
Meaning: If a light or a computer comes on, it starts working.Synonym: go on
- come on I was asleep in bed when, all of a sudden, the lights came on!
- come on I've set the radio in my room to come on at 6.30, but if I'm not up by 7, could you bang on my door?
The water heater doesn't come on automatically. You have to