break off in WordNet English dictionary

1. prevent completion
   "stop the project"; "break off the negotiations"
   break  break off  discontinue  stop 
   
2. break a piece from a whole
   "break a branch from a tree"
   break  break off  snap off 
   
3. break off (a piece from a whole)
   "Her tooth chipped"
   chip  chip off  come off  break away  break off 
   
4. interrupt before its natural or planned end
   "We had to cut short our vacation"
   cut short  break short  break off 
   
5. break a small piece off from
   "chip the glass"; "chip a tooth"
   chip  knap  cut off  break off 
   

break off in English Wiktionary