All 5 Uses of

provincial
in
A Prayer for Owen Meany

But that year the North Vietnamese attacked more than a hundred South Vietnamese towns—more than thirty provincial capitals.†
p. 95.5

My grandmother was outraged that there were people who actually dared to condescend to her—to treat her like some provincial fussbudget.†
p. 112.9

When I first came to Canada, I thought it was going to be easy to be a Canadian; like so many stupid Americans, I pictured Canada as simply some northern, colder, possibly more provincial region of the United States—I imagined it would be like moving to Maine, or Minnesota.†
p. 460.3

It was a surprise to discover that Toronto wasn't as snowy and cold as New Hampshire—and not nearly as provincial, either.†
p. 460.4 *

On the other hand, she was one of those New Yorkers who thought she would "die" if she spent a minute outside New York— who was sure that the rest of the world was a provincial whipping post whereat people like herself, of sophisticated tastes and highly urban energies, would be lashed to the stake of old-fashioned values and virtues until she expired of boredom.†
p. 538.3

Definitions:

(1) (provincial as in: provincial attitude)
unsophisticated (meant disapprovingly to refer to old-fashioned or narrow-minded attitudes and ideas)
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Provincial can also mean "related to a province" or "related to the provinces." Its more literary meaning of unsophisticated originated as a pejorative term for ideas held in the provinces that were considered old-fashioned or uninformed by many who lived in the capital city.