What is the meaning of Break_in?

To enter a place by force or illicit means.

To cause (something, or someone, new) to function more naturally through use or wear

Starting something brand new or at a new level.

To tame; make obedient; to train to follow orders of the owner.

To take the virginity of a girl, to deflower.

To interrupt one's conversation; speak before another person has finished speaking.

To initiate a new person into prostitution or prison sex acts.

Source: wiktionary.org