Definition of harmonist
plural -s
1 a
: a member of a school of theorists in ancient Greece who intensively investigated the mathematical basis for musical pitch relations
b
archaic
: a person who composes or performs music
c
: a composer who emphasizes harmony above other musical elements
d
: a musician skilled in performing or improvising harmony
e
: a collection of songs or hymns
- a religious songbook titled The Devotional Harmonist
2
: one who shows the agreement or harmony of corresponding passages of different literary works (as the Gospels)
- editorial harmonists of the Pentateuch
- —Interpreter's Bible
3
: harmonizer
4
usually capitalized
[Harmony, community in Pennsylvania + English -ist]
: harmonite 
