- characterized by or given to pretentious or conspicuous show in an attempt to impress others: an ostentatious dresser.
- (of actions, manner, qualities exhibited, etc.) intended to attract notice: Lady Bountiful’s ostentatious charity.
- characterized by pretentious, showy, or vulgar display
adj.1701, from ostentation + -ous. Earlier in a similar sense were ostentative (c.1600); ostentive (1590s). Related: Ostentatiously; ostentatiousness (1650s).