Definition from macmillandictionary.com
How’s the building work coming on?
She’s coming on fine with her music.
His French has really come on since last year.
I saw a light come on in an upstairs window.
We all had to be quiet when the news came on.
When he came on, the audience finally began to show some interest.
Then the president comes on and tells everyone to spend more money.
He came on as a substitute.
Miller came on for Thompson in the 75th minute of the game.
It came on to rain.
I can feel another headache coming on.
Come on! We’re going to be late.
Come on! It’s not the end of the world.
Oh, come on! Only a fool would believe a story like that!