altaristEtymologyFrom altar + -ist. Compare Latin altarista, French altariste.altarist means someone responsible for or at a church's altar; A chaplain. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounSomeone responsible for or at a church's altar; A chaplain.Someone responsible for or at a church's altar; The vicar or priest.