Source : Webster's Revised Unabridged Dictionary (1913)

Orotund \O"ro*tund`\, a. [L. os, oris, the mouth + rotundus
   round, smooth.]
   Characterized by fullness, clearness, strength, and
   smoothness; ringing and musical; -- said of the voice or
   manner of utterance. -- n. The orotund voice or utterance
   --Rush.

Source : WordNet®

orotund
     adj 1: ostentatiously lofty in style; "a man given to large talk";
            "tumid political prose" [syn: {bombastic}, {declamatory},
             {large}, {tumid}, {turgid}]
     2: (of sounds) full and rich; "orotund tones"; "the rotund and
        reverberating phrase"; "pear-shaped vowels" [syn: {rotund},
         {round}, {pear-shaped}]