one of a body of dignitaries or prebendaries attached to a cathedral or a collegiate church; a member of the chapter of a cathedral or a collegiate church.
2.
Roman Catholic Church. one of the members (canons regular) of certain religious orders.
Origin: 1150–1200; Middle English; back formation from Old English canōnic (one) under rule < Medieval Latin canōnicus,Latin: of or under rule < Greek kanōnikós.See canon1, -ic