I. -rēən noun
( -s )
Usage: usually capitalized
Etymology: Oratory of St. Philip Neri + English -an
: a member of the Oratory of St. Philip Neri established in Rome in 1564 as a religious society of diocesan priests that live a community life but do not make special vows
II. adjective
Usage: usually capitalized
: of or relating to the Oratorians