Jazz: A style of music of Afro-American roots chracterized by a strong rythmic understructure, blue notes, and improvisation on melody and chord structure.
Jubilate: A song of praise, usually based on Psalm 100.
Just Tuning: Any system of tuning in which the intervals are pure, and do not
deviate from the overtone series.
Just Tuning: Any system of tuning in which the intervals are are tuned so that they do not beat.