The practice of talking and thinking about oneself excessively because of an undue sense of self-importance. His egotism was evident when he spent the entire meeting discussing his own achievements.
An exaggerated sense of one's own importance; self-centeredness or conceit. Her blatant egotism made teamwork almost impossible.
(philosophy, dated) The ethical doctrine that individual self-interest is the proper motive of all conduct. In his treatise, the author defends egotism as the only rational basis for moral action.