In Nietzschean thought (also with capital initial): an ideal superior man of the future who transcends conventional Christian morality to create and…

= superman, n. 1.

an early synonym of superman, n.

A superhuman being; a superman or superwoman.

= superman, n. Also in extended and weakened senses.

A superhuman being; a person of extraordinary power or ability. Cf. superman, n. 1.

In works of Science Fiction: a being of superior intelligence, physique, etc.; a superman. Hence used gen. among fans of this type of literature.