A "glittery dress" refers to a dress that has shiny, sparkling materials or decorations on it, making it look glamorous and eye-catching. Full definition
When I was done cleaning the last of the barf remnants, from my voyeuristic vantage point at the kitchen window I could see flashes of glittery dresses and crisp bow ties twirling next to the pool, where burlesque dancers lounged on enormous rafts shaped like swans. (jillianlauren.com)
Christmas (as well as New Year's Eve) is the perfect occasion to finally wear that shiny sparkly glittery dress you kept in your closet for like forever. (dresscape.com)
Even though it was radio, they wore full make - up and their teeny, tiny glittery dresses from the show. (housegoeshome.com)