Having been treated with a substance that removes shine, creating a matte or dull finish.
Past participle of 'deluster' (verb, to treat with a dulling agent), formed by adding '-ed.' Entered English in the early 20th century as textile manufacturing terminology.
Fashion loves the back-and-forth between shiny and matte—one decade demands glossy fabrics, the next wants sophisticated dull finishes. 'Delustered' is how textile makers deliver whatever look is trending.
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