noun
- a combining of the four Gospels of the Bible (Matthew, Mark, Luke, and John) into a single narrative.
- (in ancient Greek music) the interval of a fourth.
noun
- music (in classical Greece) the interval of a perfect fourth
- a conflation of the four Gospels into a single continuous narrative
late 14c. as a term in music meaning “interval of a fourth;” 1803 in reference to harmonizings of the gospels, especially that of Tatian (2c.), from Greek dia tessaron, from dia “composed of” (literally “through;” see dia-) + tessaron “four,” related to tessares (see four).