@Dominions Son
canon
"A canon is a member of the chapter of (for the most part) priests, headed by a dean, which is responsible for administering a cathedral or certain other churches that are styled collegiate churches. The dean and chapter are the formal body which has legal responsibility for the cathedral and for electing the bishop." There is also something called canon law.
And in Music "Canon, musical form and compositional technique, based on the principle of strict imitation, in which an initial melody is imitated at a specified time interval by one or more parts, either at the unison (i.e., the same pitch) or at some other pitch."
And then there are can on and can off.