Definition of "brightener" [brightener]

• Any substance added to an electrolytic bath to yield a brighter electroplated surface. (noun)

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• "This is the perfect instant face brightener for when the sun is low in the sky and we move to shorter days and long winter nights."
• "Terry de Gunzburg is one of the great makeup artists of the past few decades; as makeup director of YSL, she created the legendary Touche Éclat concealer and brightener."
• "Always a day-brightener. katy May 4 these rainbow cupcakes are soooooooooooo cute!"