the act of moving along or proceeding in orderly succession or in a formal and ceremonious manner, as a line of people, animals, vehicles, etc.
the line or body of persons or things moving along in such a manner.
an office, litany, etc., said or sung in a religious procession.
the emanation of the Holy Spirit from the Father and later, in the Western Church, from the Son: distinguished from the “generation” of the Son and the “unbegottenness” of the Father.