Break In definition

(1) Make submissive, obedient, or useful

"The horse was tough to break"

"I broke in the new intern"

(2) Break so as to call inward

"He broke in the door"

(3) Start in a certain activity, enterprise, or role

(4) Break into a conversation

"Her husband always chimes in, even when he is not involved in the conversation"

(5) Intrude on uninvited

"The nosy couple broke in on our conversation"

(6) Enter someone's property in an unauthorized manner, usually with the intent to steal or commit a violent act

"Someone broke in while I was on vacation"

"They broke into my car and stole my radio!"