Source : Webster's Revised Unabridged Dictionary (1913)

Rotund \Ro*tund"\, a. [L. rotundus. See {Round}, and cf.
   {Rotunda}.]
   1. Round; circular; spherical.

   2. Hence, complete; entire.

   3. (Bot.) Orbicular, or nearly so. --Gray.

Rotund \Ro*tund"\, n.
   A rotunda. [Obs.] --Burke.

Source : WordNet®

rotund
     adj 1: spherical in shape
     2: (of sounds) full and rich; "orotund tones"; "the rotund and
        reverberating phrase"; "pear-shaped vowels" [syn: {orotund},
         {round}, {pear-shaped}]
     3: excessively fat; "a weighty man" [syn: {corpulent}, {obese},
         {weighty}]