Definition from macmillandictionary.com
The children saw the sea and broke into a run.
We watched her puzzled face break gently into a smile.
I almost expected him to break into song.
My legs were shaking with exhaustion, but Phil hadn’t even broken into a sweat.
We see the deal with China as a way of breaking into markets in the Far East.
It’s always been his ambition to break into broadcasting.
We had to break into our savings to pay the fine.
Christopher’s voice broke into her thoughts.