Source : WordNet®

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