break in in WordNet English dictionary

1. break into a conversation
   "her husband always chimes in, even when he is not involved in the conversation"
   chime in  cut in  put in  butt in  chisel in  barge in  break in 
   
2. make submissive, obedient, or useful
   "The horse was tough to break"; "I broke in the new intern"
   break in  break 
   
3. enter someone's (virtual or real) 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!"; "who broke into my account last night?"
   break in  break 
   
4. break so as to fall inward
   "He broke in the door"
   break in 
   
5. start in a certain activity, enterprise, or role
   break in 
   
6. intrude on uninvited
   "The nosy couple broke in on our conversation"
   break in 
   

break in in English Wiktionary