/ ˈhɪlbɪli; NAmE / noun ( pl. -ies )
1.
[ C ] ( NAmE , disapproving ) a person who lives in the mountains and is thought to be stupid by people who live in the towns
2.
[ U ] = country and western
For more information see the Cultural Guide
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WORD ORIGIN
early 20th cent.: from hill + Billy (pet form of the given name William ).