[chap.lain] n [ME chapelain, fr. OF, fr. ML cappellanus, fr. cappella] (14c) 1: a clergyman in charge of a chapel
2: a clergyman officially attached to a branch of the military, to an institution, or to a family or court
3: a person chosen to conduct religious exercises (as at a meeting of a club or society)
4: a clergyman appointed to assist a bishop (as at a liturgical function) -- chap.lain.cy n