Christ, used by Christians as both a name and a title, unambiguously refers to Jesus. It is also used as a title, in the reciprocal use "Christ Jesus", meaning "the Messiah Jesus", and independently as "the Christ". The Pauline epistles, the earliest texts of the New Testament, often refer to Jesus as "Christ Jesus" or "Christ".

The concept of the Christ in Christianity originated from the concept of the messiah in Judaism. Christians believe that Jesus is the messiah foretold in the Hebrew Bible and the Christian Old Testament. Although the conceptions of the messiah in each religion are similar, for the most part they are distinct from one another due to the split of early Christianity and Judaism in the 1st century.

Although the original followers of Jesus believed Jesus to be the Jewish messiah, e.g. in the Confession of Peter, Jesus was usually referred to as "Jesus of Nazareth" or "Jesus, son of Joseph". Jesus came to be called "Jesus Christ" (meaning "Jesus the Khristós", i.e. "Jesus the Messiah" or "Jesus the Anointed") by Christians, who believe that his crucifixion and resurrection fulfill the messianic prophecies of the Old Testament.