Source : Webster's Revised Unabridged Dictionary (1913)

Egotistic \E`go*tis"tic\, Egotistical \E`go*tis"tic*al\, a.
   Addicted to, or manifesting, egotism.

   Syn: Conceited; vain; self-important; opinionated.

Source : WordNet®

egotistical
     adj 1: characteristic of those having an inflated idea of their own
            importance [syn: {egotistic}, {narcissistic}, {self-loving}]
     2: characteristic of false pride; having an exaggerated sense
        of self-importance; "a conceited fool"; "an attitude of
        self-conceited arrogance"; "an egotistical disregard of
        others"; "so swollen by victory that he was unfit for
        normal duty"; "growing ever more swollen-headed and
        arbitrary"; "vain about her clothes" [syn: {conceited}, {egotistic},
         {self-conceited}, {swollen}, {swollen-headed}, {vain}]