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English definition of “luster”

luster

noun [U]  /ˈlʌs·tər/ us  

luster noun [U] (BRIGHTNESS)

the brightness of a smooth or shiny surface: The polished furniture had a rich luster.

luster noun [U] (SPECIAL QUALITY)

the quality of being attractive or special: The commercial district around the theater had lost its luster, becoming a magnet for the homeless and driving moviegoers elsewhere.
lustrous
adjective [not gradable]  /ˈlʌs·trəs/ us  
This conditioner will give your hair a lustrous glow.
(Definition of luster from the Cambridge Academic Content Dictionary © Cambridge University Press)
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