1. 折断；（使）断开
If part of something breaks off or if you break it off, it comes off or is removed by force.
2. 突然中止；突然停顿
If you break off when you are doing or saying something, you suddenly stop doing it or saying it.
3. 终止，结束（关系）
If someone breaks off a relationship, they end it.
1. prevent completion
e.g. stop the project
break off the negotiations
Synonym: breakdiscontinuestop
2. interrupt before its natural or planned end
e.g. We had to cut short our vacation
Synonym: cut shortbreak short
3. break a small piece off from
e.g. chip the glass
chip a tooth
4. break off (a piece from a whole)
e.g. Her tooth chipped
Synonym: chipchip offcome offbreak away
5. break a piece from a whole
e.g. break a branch from a tree