Superhuman can mean an improved human, for example, by genetic modification, cybernetic implants, or as what humans might evolve into, in the near or distant future. Occasionally, it could mean an otherwise "normal" human with unusual abilities, such as psychic abilities, flying abilities, unimaginable strength or exceptional proficiency at something, far beyond the normal.
Superhuman can also mean something that is not human, but considered to be "superior" to humans in some ways. A robot that easily passed the Turing test, and could do some things humans cannot, could be considered superhuman. A very intelligent or strong alien could be considered superhuman. In its most basic sense it means anything beyond (typical) human capabilities, e.g. a tiger may be described as having "superhuman strength".
Famous quotes containing the word superhuman:
“A superhuman will is needed in order to write, and I am only a man.”
—Gustave Flaubert (18211880)
“Woman ... cannot be content with health and agility: she must make exorbitant efforts to appear something that never could exist without a diligent perversion of nature. Is it too much to ask that women be spared the daily struggle for superhuman beauty in order to offer it to the caresses of a subhumanly ugly mate?”
—Germaine Greer (b. 1939)
“Do you believe that the dead can influence the living?... Could you conceive of a superhuman mentality influencing someone from the other side of death?... There is such a one.... Someone, something that reaches out from beyond the grave and fills me with horrible impulses.”
—Garrett Fort (19001945)