noun.
A framework in the form of a passageway of columns that supports a trellisworkroof; used to support and train climbingplants
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a framework that supports climbing plants
Word Usage
"Well, often what you'll see in a pergola is a lot more lattice going in closer together and going perpendicular to that, creating the surface for the growing vine and to block sun, of course."