Sentence:  My intention , therefore , is not to say that Faulkner 's awareness has been confined within the borders of the South , but rather that he has looked at his world as a Southerner and that presumably his outlook <WSD>is</WSD> Southern . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)