Pronunciation: /ˈbɑːbəʃɒp/
noun
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1chiefly North American a shop where a barber works.
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2 [mass noun, often as modifier] a popular style of close harmony singing, typically for four male voices: a barbershop quartet[from the custom in the 16th and 17th centuries of passing time in a barber's shop by harmonizing to a lute or guitar provided to entertain customers waiting their turn]