Source : Webster's Revised Unabridged Dictionary (1913)

Bombastic \Bom*bas"tic\ (b[o^]m*b[.a]s"t[i^]k or
   b[u^]m*b[.a]s"t[i^]k), Bombastical \Bom*bas"tic*al\, a.
   Characterized by bombast; high-sounding; inflated. --
   {Bom*bas"tic*al*ly}, adv.

         A theatrical, bombastic, windy phraseology. --Burke.

   Syn: Turgid; tumid; pompous; grandiloquent.

Source : WordNet®

bombastic
     adj : ostentatiously lofty in style; "a man given to large talk";
           "tumid political prose" [syn: {declamatory}, {large}, {orotund},
            {tumid}, {turgid}]