Source : Webster's Revised Unabridged Dictionary (1913)

Allspice \All"spice`\, n.
   The berry of the pimento ({Eugenia pimenta}), a tree of the
   West Indies; a spice of a mildly pungent taste, and agreeably
   aromatic; Jamaica pepper; pimento. It has been supposed to
   combine the flavor of cinnamon, nutmegs, and cloves; and
   hence the name. The name is also given to other aromatic
   shrubs; as, the {Carolina allspice} ({Calycanthus floridus});
   {wild allspice} ({Lindera benzoin}), called also {spicebush},
   {spicewood}, and {feverbush}.

Source : WordNet®

allspice
     n 1: aromatic West Indian tree that produces allspice berries
          [syn: {allspice tree}, {pimento tree}, {Pimenta dioica}]
     2: deciduous shrubs having aromatic bark; eastern China;
        southwestern and eastern United States
     3: ground dried berrylike fruit of a West Indian allspice tree;
        suggesting combined flavors of cinnamon and nutmeg and
        cloves