All 4 Uses of

arbor

in

Education of Little Tree

She said she got the Holy Ghost once at a bush arbor meetin' and got saved.
Chpt 11. *

arbor = a shady rest area in a garden

She said being a Christian made you happy and that bush arbors was times when they was happiest, being full of the Holy Ghost and all.
Chpt 11.

arbors = frameworks that support climbing plants

He said he had tried going to bush arbor meetings to git saved, but there was always girls around them too that kept after him to fornicate.
Chpt 15.

arbor = a framework that supports climbing plants; or a shady rest area made by such a framework or by trees and shrubs

He said he had found an old preacher who was too old to fornicate, he figgered, because he was holding a bush arbor meeting and was preaching, no-holds-barred, agin' fornicatin'.
Chpt 15.

Definitions:

(1) (arbor as in: shaded arbor)
a framework that supports climbing plants; or a shady rest area made by such a framework or by trees and shrubs

The framework of an arbor is generally thought of as a wood lattice made to support vines, but it can also be a natural framework such as trees.
(2) (meaning too rare to warrant focus)
Much more rarely, an arbor can be used as a proper noun to reference a location. As a common noun, it can also reference various types of rotating machine shafts.