The Collaborative International Dictionary of English v.0.48:

Provincialism \Pro*vin"cial*ism\, n. [Cf. F. provincialisme.]
   A word, or a manner of speaking, peculiar to a province or a
   district remote from the mother country or from the
   metropolis; a provincial characteristic; hence, narrowness;
   illiberality. --M. Arnold.
   [1913 Webster]

WordNet (r) 3.0 (2006):

provincialism
    n 1: a lack of sophistication
    2: a partiality for some particular place [syn: sectionalism,
       provincialism, localism]