- The definition of ostentatious is someone or something designed to get notice or draw attention by being inappropriate, showy, vulgar and in bad taste.
An example of ostentatious is when someone buys huge diamonds and drives very expensive cars in order to show off.
(comparative more ostentatious, superlative most ostentatious)
Variant of ostentation
Origin of ostentationMiddle English ostentacioun ; from Classical Latin ostentatio ; from ostentare ; from ostendere: see ostensible