Mary Shafer wrote:
B2431 wrote:

The church defines a canon as a law, rule or set of books depending
on how it is used.

In the Anglican (Episcopalian) church, a canon is a priest assigned
to a choir school, cathedral, or other establishment. They show up
in Golden Age mysteries a lot.

Mary, that is an *additional* meaning in the Anglican church.

Canons are variously the rules or folk who are supposed to take some
part in upholding the rules. :-)