All 3 Uses

arbor
in
The Brothers Karamazov
(Edited)

Alyosha had at once observed his brother's exhilarated condition, and on entering the arbor he saw half a bottle of brandy and a wineglass on the table.
Chpt 3 *

arbor = a framework that supports climbing plants; or a shady rest area made by such a framework or by trees and shrubs
Mitya was in haste; he rushed towards Fyodor Pavlovitch's by the back way, to his arbor, to get hold of Smerdyakov as soon as possible.
Chpt 8
It was a rush of that sudden, furious, revengeful anger of which he had spoken, as though foreseeing it, to Alyosha, four days ago in the arbor, when, in answer to Alyosha's question, "How can you say you'll kill our father?"
Chpt 8

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)
Less commonly arbor can be used as a proper noun to reference a location such as Ann Arbor, Michigan. As a common noun, it can also reference various types of rotating machine shafts.