Source : Webster's Revised Unabridged Dictionary (1913)

Vainglorious \Vain`glo"ri*ous\, a.
   Feeling or indicating vainglory; elated by vanity; boastful.
   ``Arrogant and vainglorious expression.'' --Sir M. Hale. --
   {Vain`glo"ri*ous*ly}, adv. -- {Vain`glo"ri*ous*ness}, n.

Source : WordNet®

vainglorious
     adj : feeling self-importance; "too big for his britches"; "had a
           swelled head"; "he was swelled with pride" [syn: {big},
            {swelled}]