egoistic

Pertaining to egoism; imbued with egoism or excessive thoughts of self; self-loving.

Ill-natured feeling, or egoistic pleasure in making men miserable.

adjective

1. Concerned with the person rather than with society: egocentric, egoistical, individualistic. See self/other.
2. Concerned only with oneself: egocentric, egoistical, egomaniacal, egotistic, egotistical, self-absorbed, self-centered, self-involved, selfish, self-seeking, self-serving. Idioms: wrapped up in oneself. See self/other.
3. Thinking too highly of oneself: conceited, egoistical, egotistic, egotistical, narcissistic, vain, vainglorious. Informal bigheaded, stuck-up, swellheaded. See self-love/modesty.

The adjective has one meaning:

Meaning #1: of or relating to the self
  Antonym: altruistic (meaning #1)