break in.1v.tr.aBrisim isteach (doras). bTo break in a horse, capall a bhriseadh. To break s.o. in to sth., duine a chló le rud. 2v.i.The wall broke in, thit an balla isteach. 3v.i.aTo break in (up)on s.o., cur isteach ar dhuine. To break in (up)on a conversation, ladar a chur isteach i gcomhrá. To break in (up)on a company, sciurdadh isteach i lúb cuideachta. b(Of burglars) Briseann isteach.