brightener noun3 •One who or that which brightens.Country air in the fields, or in gardens, when breathed at proper hours, is an excellent bracer of the nerves, and a sure brightener of the complexion. — 1830 •A chemical agent that absorbs ultraviolet and violet light and re-emits blue light by fluorescence, used to make fabric or paper look whiter. •Any substance added to an electrolytic bath to yield a brighter electroplated surface. formsbrighteners
