pergola

noun2

1. •
   A framework in the form of a passageway of columns that supports a trelliswork roof; used to support and train climbing plants.

   • While both pergolas and arbors are most dramatic cloaked in climbing, flowing plants, only a pergola will stand naked as a piece of architecture. — 2000
2. •
   Such a framework employed to provide shade, especially over a patio.