Tending to talk excessively about oneself.(adjective)
Believing oneself to be better and more important than others.(adjective)
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Use "egotistical" in a sentence
"Of 32 revolutionary leaders, 23 were described as egotistical, narcissistic, and searching for personal fame and glory Rejai, 1980."
"I know folks who are less egotistical, that is, not wrapped up in the idea that they are the center of the universe, or who are working to get past that notion, but being a zen master or yoga adept is not a guarantee that you leave the monkey brain completely behind."
"Pardon me should I use the personal pronoun "I" too frequently, as I do not wish to be called egotistical, for I only write of what I saw as an humble private in the rear rank in an infantry regiment, commonly called "webfoot.""