Source : Webster's Revised Unabridged Dictionary (1913)

Ostentatious \Os`ten*ta"tious\, a.
   Fond of, or evincing, ostentation; unduly conspicuous;
   pretentious; boastful.

         Far from being ostentatious of the good you do.
                                                  --Dryden.

         The ostentatious professions of many years. --Macaulay.
   -- {Os`ten*ta"tious*ly}, adv. -- {Os`ten*ta"tious*ness}, n.

Source : WordNet®

ostentatious
     adj 1: intended to attract notice and impress others; "an
            ostentatious sable coat" [syn: {pretentious}] [ant: {unostentatious}]
     2: of a display that is tawdry or vulgar [syn: {pretentious}, {kitsch}]