Source : Webster's Revised Unabridged Dictionary (1913)

Pergola \Per"go*la\, n. [It., fr. L. pergula shed, shop, vine
   arbor.]
   Lit., an arbor or bower; specif.: (Italian art) An arbor or
   trellis treated architecturally, as with stone columns or
   similar massive structure.

Source : WordNet®

pergola
     n : a framework that supports climbing plants; "the arbor
         provided a shady resting place in the park" [syn: {arbor},
          {arbour}, {bower}]