Phrasal Verb: Break in

Meaning: Go into a building to steal something

Example: The burglars BROKE IN and stole the TV and video.

Meaning: Interrupt something

Example: I'm sorry to BREAK IN on your conversation, but there's a problem.

Meaning: Train a horse to be ridden

Example: It took ages to BREAK the horse IN.

Meaning: Carefully use new products until they are fully functional.

Example: I must watch my speed until I BREAK IN my new Volvo.