gospel

(noun) the four books in the New Testament (Matthew, Mark, Luke, and John) that tell the story of Christ's life and teachings. Synonyms: Gospel, Gospels, evangel.

(noun) an unquestionable truth. Synonyms: gospel truth. Example: "His word was gospel."

(noun) folk music consisting of a genre of a cappella music originating with Black slaves in the United States and featuring call and response; influential on the development of other genres of popular music (especially soul). Synonyms: gospel singing.

(noun) the written body of teachings of a religious group that are generally accepted by that group. Synonyms: religious doctrine, church doctrine, creed.

(noun) a doctrine that is believed to be of great importance. Example: "Newton's writings were gospel for those who followed."