What is the meaning of break off?

verb

• Interrupt before its natural or planned end.
  • usage: "We had to cut short our vacation"
  • synonyms: cut short, break short
• Prevent completion.
  • usage: "stop the project"; "break off the negotiations"
  • synonyms: break, discontinue, stop
• Break off (a piece from a whole. )
  • usage: "Her tooth chipped"
  • synonyms: chip, chip off, come off, break away
• Break a piece from a whole.
  • usage: "break a branch from a tree"
  • synonyms: break, snap off
• Break a small piece off from.
  • usage: "chip the glass"; "chip a tooth"
  • synonyms: chip, knap, cut off