Definition of "provinciality"

Her father, who was sitting at the piano, his long fingers raised as though about to play, whirled about and cut in quickly with an unintelligible answer, "Your Aunt Victoria refers to non-existent phenomena, my dear, in order to bring home to us the uncouth provinciality in which we live."

1915, Dorothy Canfield, The Bent Twig‎

Our literary gentleman, at all events, found his task very engaging, though as a cataloguer he was much perplexed by the extraordinary informality, in one respect, of formal public papers, a curious provinciality, as he could but take it to be, of municipalities.

1918, Robert Cortes Holliday, Walking-Stick Papers‎