break into

[break into] {v.} 1. To force an entrance into; make a rough or unlawful entrance into.

Thieves broke into the store at night.

2. {informal} To succeed in beginning (a career, business, or a social life).

He broke into television as an actor.

3. To interrupt.

He broke into the discussion with a shout of warning.

4. To begin suddenly.

He broke into a sweat.

She broke into tears.

The dog heard his master's whistle and broke into a run.