One devoted to one's own interests and advancement; an egocentric person.(noun)
An adherent of egoism.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "egoist" in a sentence
"For the psychological egoist, that is not even a possibility."
"Stirner is occasionally portrayed as a psychological egoist, that is, as a proponent of the descriptive claim that all (intentional) actions are motivated by a concern for the self-interest of the agent."
"Kant1 is not saying enough when he says that the egoist is a person who always tries to push his own I forward and to make it the chief object of his own and of everybody else's attention."