Source : Webster's Revised Unabridged Dictionary (1913)

Bullace \Bul"lace\, n. [OE. bolas, bolace, OF. beloce; of Celtic
   origin; cf. Arm. bolos, polos, Gael. bulaistear.] (Bot.)
      (a) A small European plum ({Prunus communis}, var.
          {insitita}). See {Plum}.
      (b) The bully tree.

Source : WordNet®

bullace
     n : small wild or half-domesticated Eurasian plum bearing small
         ovoid fruit in clusters [syn: {Prunus insititia}]