Merriam-Webster Collegiate Dictionary - luster

 I. noun  or lustre  Etymology: Middle English lustre, from Latin lustrum  Date: 14th century a period of five years ; lustrum 2  II. noun  or lustre  Etymology: Middle French lustre, from Old Italian lustro, from lustrare to brighten, from Latin, to purify ceremonially, from lustrum  Date: circa 1522  1. a glow of reflected light ; sheen; specifically the appearance of the surface of a mineral dependent upon its reflecting qualities  2.  a. a glow of light from within ; luminosity  b. an inner beauty ; radiance  3. a superficial attractiveness or appearance of excellence  4.  a. a glass pendant used especially to ornament a candlestick or chandelier  b. a decorative object (as a chandelier) hung with glass pendants  5. chiefly British a fabric with cotton warp and a filling of wool, mohair, or alpaca  6. ~ware  • ~less adjective  III. verb  or lustre  (~ed or lustred; ~ing or lustring)  Date: 1528  intransitive verb to have ~ ; gleam  transitive verb  1. to give ~ or distinction to  2. to coat or treat with a substance that imparts ~