- 1 to enter a building by force; to open a car, etc. by force We had our car broken into last week. related noun break-in See related entries: Committing crime
- 2to begin laughing, singing, etc. suddenly As the President's car drew up, the crowd broke into loud applause.
- 3to suddenly start running; to start running faster than before He broke into a run when he saw the police. Her horse broke into a trot.
- 4(British English) to use a banknote of high value to buy something that costs less I had to break into a £20 note to pay the bus fare.
- 5to open and use something that has been kept for an emergency They had to break into the emergency food supplies.
- 6to be successful when you get involved in something The company is having difficulty breaking into new markets.