Source : Webster's Revised Unabridged Dictionary (1913)

Ostentate \Os"ten*tate\, v. t. [L. ostentatus, p. p. of
   ostentare, v. intens. fr. ostendere. See {Ostent}.]
   To make an ambitious display of; to show or exhibit
   boastingly. [R.] --Jer. Taylor.

Source : WordNet®

ostentate
     v : display proudly; act ostentatiously or pretentiously; "he
         showed off his new sports car" [syn: {flaunt}, {flash}, {show
         off}, {swank}]