organist(n = noun.person) - a person who plays an organ;
is a kind of instrumentalist, musician, player
has particulars: bach, johann sebastian bach, anton bruckner, bruckner, byrd, william byrd, couperin, francois couperin, henry purcell, purcell, albert schweitzer, schweitzer, tallis, thomas tallis
Derived forms noun organ₃, noun organ₆, noun organ₅

1.  One who plays on the organ. [1913 Webster]

2.  One of the priests who organized or sung in parts. [1913 Webster]

organist, n. the player of an organ.

N  musician, artiste, performer, player, minstrel, bard, accompanist, accordionist, instrumentalist, organist, pianist, violinist, flautist, harper, fiddler, fifer, trumpeter, piper, drummer, catgut scraper, band, orchestral waits, vocalist, melodist, singer, warbler, songster, chaunter, chauntress, songstress, cantatrice, choir, quire, chorister, chorus, chorus singer, liedertafel, nightingale, philomel, thrush, siren, bulbul, mavis, Pierides, sacred nine, Orpheus, Apollo, the Muses Erato, Euterpe, Terpsichore, tuneful nine, tuneful quire, composer, performance, execution, touch, expression, solmization, playing, musical, adagio, andante.