Messiah comes from the Hebrew word "mashiach" and means "anointed one" or "chosen one". In Judaism, the term refers to a future Jewish king from the Davidic line who will be "anointed" with holy anointing oil, to be king of Gods kingdom, and rule the Jewish people during the Messianic Age. In Christianity, the Greek translation of Messiah is "Khristós" (Χριστός), anglicized as Christ, and Jesus of Nazareth is commonly referred to as either the "Christ" or the "Messiah". Christians believe that the messianic prophecies were fulfilled in the mission, death, and resurrection of Jesus and that he will return to fulfill the rest of messianic prophecies.
The Jews of Jesus’ day expected the Messiah to redeem Israel by overthrowing the rule of the Romans and establishing an earthly kingdom. However, it wasnt until after Jesus’ resurrection that His disciples finally began to understand what the prophecies in the Old Testament really meant the Messiah would do. The Messiah was "anointed" first to deliver and consecrated for the work He had given them to do.
In summary, Messiah means "anointed one" or "chosen one" and refers to a savior or liberator of a group of people in Abrahamic religions. In Judaism, the Messiah is a future Jewish king from the Davidic line, while in Christianity, Jesus of Nazareth is commonly referred to as either the "Christ" or the "Messiah".