From Longman Dictionary of Contemporary Englishbreak in phrasal verb1ENTERto enter a building by using force, in order to steal somethingThieves broke in and stole £10,000 worth of computer equipment. →break-in2INTERRUPTto interrupt someone when they are speaking onI didn’t want to break in on his telephone conversation. withDad would occasionally break in with an amusing comment.3WEAR CLOTHES break something ↔ in to make new shoes or boots less stiff and more comfortable by wearing themI went for a walk to break in my new boots.4USED TO/ACCUSTOMED TO break somebody in to help a person get used to a certain way of behaving or workingShe’s quite new to the job, so we’re still breaking her in.5break something ↔ in to teach a young horse to carry people on its backWe break the horses in when they’re about two years old. →break→ See Verb table
Examples from the Corpus
break in• Thieves broke into the gallery and made off with paintingsvalued at over $2 million.• "Sam, what on earth are you talking about?' she broke in at last.• Elaine took a six-month break in her studies.• 'That's enough, ' the guardbroke in impatiently. 'Hurry up and say goodbye.'• The tutor finally broke in on Sam's monologue, much to the relief of the rest of the class.• If anyone tries to break in, the alarm will go off.• Occasionally you could see the moon through a break in the clouds.• There was an awkwardbreak in the conversation.break with• I broke in withsketches for Dave Allen and Frankie Howerd.• TVnewsanchors periodically broke in withupdates on the incident.
break-inˈbreak-in noun [countable]SCCSTEALan act of entering a building illegally and by force, especially in order to steal thingsSince the break-in we’ve had all our locks changed. → break inat break1