συμφωνίας [1 verse](noun sg fem gen) "Music" is symphonia, which means "concord or unison of sound", "musical concord", "harmony", "agreement", " band", and "orchestra". -- "Music" is a Greek noun used by Jesus only here. It means "concord or unison of sound", "musical concord", "harmony", "agreement", " band", and "orchestra".  It is not the Greek word from music. Here, it would probably be heard as both "a band" and "harmony" in the sense of agreement. The form is possessive, but it works as an object here (the objective genitive).