"confidence of one's own judgment or ability, reliance on one's own powers without other aid," 1650s, a back-formation from self-confident, or else from self- + confidence.

also self concept, in psychology, "a person's idea of himself," 1921, from self + concept.

"educated by one's own efforts alone, without regular training," 1761, from self- + educated.

"regulating itself," 1837, from self- + present participle of regulate (v.). Related: Self-regulated; self-regulation.

"self-taught; educated by one's own efforts alone, without regular training," 1725; see self- + taught.

c. 1600, "self-deception, abuse of one's own person or powers," from self- + abuse (n.). As a synonym for "masturbation," it is recorded from 1728; an earlier term was self-pollution (1620s).

"realization or fulfillment of oneself," 1939, from self- + actualization. Popularized, though not coined, by U.S. psychologist and philosopher Abraham H. Maslow.

1670s, "fixed, stationary," from self- + center (v.). In reference to persons, "engrossed in the self, with little regard for others," it is recorded from 1783.

"having or showing an exaggerated estimation of one's own importance, pompously egotistical," 1728, from self- + important. Related: Self-importance (1728); self-importantly.

"inflicted by or on oneself," 1784; see self- + inflict. Related: Self-infliction.