For Jews, the Messiah is the King of the Jews, who will be sent to them by God.
N-PROPER
耶稣基督;救世主
For Christians, the Messiah is Jesus Christ.
N-COUNT
救星;救世主
If you refer to someone as a messiah, you mean that they are expected to do wonderful things, especially to rescue people from a very difficult or dangerous situation, or that they are thought to have done these things.