regionalism
US /ˈriː.dʒən.əl.ɪ.zəm/
UK /ˈriː.dʒən.əl.ɪ.zəm/
1.
a linguistic feature peculiar to a particular region and not part of the standard language of a country
:
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The dialect was full of interesting regionalisms.
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Many old regionalisms are slowly disappearing from common usage.
2.
the theory or practice of emphasizing the regional characteristics of a place or people
:
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The architect's design embraced a strong sense of regionalism.
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The political movement advocated for greater regionalism and local autonomy.