to enter a building or place by force, usually to steal something or without permission.
Someone tried to break in while we were on holiday, but the alarm scared them away.
A: Why are the police outside your house? B: Someone broke in last night, but luckily nothing was taken.
If I ever saw someone trying to break in to a neighbor’s house, I would call the police immediately.
Common mistake
✗Thieves broke in the house last night.
✓Thieves broke into the house last night. / Thieves broke in last night.
With a place named, use 'break INTO the house'; bare 'break in' (no object) is also fine.
Tell it apart
Burglars broke in through the back.
entered by force
The prisoners broke out of the cell.
escaped by force
Use 'break in' or 'break into' when talking about someone entering a place without permission, often for stealing.'Break in' can also mean to interrupt someone, which is a different sense.