Meaning : An unusually gifted or intelligent (young) person. Someone whose talents excite wonder and admiration.
Example :
She is a chess prodigy.
Meaning : A sign of something about to happen.
Example :
He looked for an omen before going into battle.
Synonyms : omen, portent, presage, prognostic, prognostication
Meaning : An impressive or wonderful example of a particular quality.
Example :
The Marines are expected to perform prodigies of valor.