(n.) State of being fashionable.

conformity consuetude convention currency custom established way etiquette fashion fashionableness folkway haute couture high fashion manner manners mode modishness mores observance popularity practice praxis prescription prevailing taste prevalence proper thing ritual social convention standard behavior standard usage standing custom stream of fashion style stylishness swim time-honored practice tradition trend usage use vogue voguishness way what is done wont wonting