an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration
She is a chess prodigy.
source: WordNet 3.0
a sign of something about to happen
He looked for an omen before going into battle.
source: WordNet 3.0
an impressive or wonderful example of a particular quality
The Marines are expected to perform prodigies of valor.
source: WordNet 3.0
Something extraordinary, or out of the usual course of nature, from which omens are drawn; a portent; as, eclipses and meteors were anciently deemed prodigies.