WordNet sense 1 (elegance by virtue of being fashionable):

chic, chichi, chicness, modishness, smartness, stylishness, last word

WordNet sense 2 (display proudly; act ostentatiously or pretentiously):

flash, flaunt, ostentate

WordNet sense 3 (imposingly fashionable and elegant):

swanky

WordNet sense 4 (being or in accordance with current social fashions):

fashionable, stylish