gos·pel 
(gŏspəl)
(gŏspəl)n.
1. often Gospel The proclamation of the redemption preached by Jesus and the Apostles, which is the central content of Christian revelation.
2.
a. Gospel Bible One of the first four New Testament books, describing the life, death, and resurrection of Jesus and recording his teaching.
b. A similar narrative.
3. often Gospel A lection from any of the first four New Testament books included as part of a religious service.
4. A teaching or doctrine of a religious teacher.
5. Music Gospel music.
6. Something, such as an idea or principle, accepted as unquestionably true: My parents' rules were gospel.
adj.
1. often Gospel Of or in accordance with the Gospel; evangelical.
2. Of or relating to gospel music.
[Middle English, from Old English gōdspel (ultimately translation of Greek euangelion) : gōd, good; see GOOD + spel, news.]