A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament. "Christian" derives from the Koine Greek word Christ, a translation of the Biblical Hebrew term Messiah.
Central to the Christian faith is the gospel, the teaching that humans have hope for salvation through the message and works of Jesus, and particularly his atoning death on the cross. Christians also believe Jesus is the Messiah prophesied in the Hebrew Bible. Most Christians believe in the doctrine of the Trinity ("tri-unity"), a description of God as Father, Son, and Holy Spirit, which retains the monotheistic belief of Christianity's Abrahamic heritage through an ineffable confluence. This includes the vast majority of the churches in Christianity. A minority of Christian churches are Nontrinitarians.
The term "Christian" is also used adjectivally to describe anything associated with Christianity, or in a proverbial sense "all that is noble, and good, and Christ-like." It is also used as a label to identify people who associate with the cultural aspects of Christianity, irrespective of personal religious beliefs or practices.