The Collaborative International Dictionary of English v.0.48:

elderberry \el"der*ber`ry\, n. (Bot.)
   1. The berrylike drupe of the elder. That of the Old World
      elder (Sambucus nigra) and that of the American sweet
      elder (S. Canadensis) are sweetish acid, and are eaten
      as a berry or made into wines or jellies.
      [Webster 1913 Suppl. + WordNet 1.5]

   2. the European variety of elder (see 3rd elder), a common
      black-fruited shrub or small tree of Europe and Asia; the
      fruit is used for wines and jellies.

   Syn: bourtree, black elder, common elder, European elder,
        Sambucus nigra.
        [WordNet 1.5]