What is the meaning of Egoism?

The tendency to think selfishly with exclusive self-interest in mind.

The belief that moral behavior should be directed toward one's self-interest only.

Egotism (tendency to talk excessively about oneself).

egoism, selfishness

egoism; the tendency to think of self and self-interest.

egoism; the belief that moral behavior should be directed toward one's self-interest.

Source: wiktionary.org