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English definition of “luster”

luster

noun [U] (BRIGHTNESS)   /ˈlʌs·tər/
the brightness of a smooth or shiny surface: The polished furniture had a rich luster. lustrous    /ˈlʌs·trəs/ adjective [not gradable] This conditioner will give your hair a lustrous glow.
(Definition of luster noun (BRIGHTNESS) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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