canon

A generally accepted principle; a rule.

“The trial must proceed according to the canons of law.”

A group of literary works that are generally accepted as representing a field.

The works of a writer that have been accepted as authentic.

“the entire Shakespeare canon”

A eucharistic prayer, particularly the Roman Canon.

A religious law or body of law decreed by the church.

“We must proceed according to canon law.”

A catalogue of saints acknowledged and canonized in the Roman Catholic Church.

In monasteries, a book containing the rules of a religious order.

A member of a cathedral chapter; one who possesses a prebend in a cathedral or collegiate church.

A piece of music in which the same melody is played by different voices, but beginning at different times; a round.

“Pachelbel’s Canon has become very popular.”

(Roman law) A rent or stipend payable at some regular time, generally annual, e.g., canon frumentarius

Those sources, especially including literary works, which are considered part of the main continuity regarding a given fictional universe.

“A spin-off book series revealed the aliens to be originally from Earth, but it's not canon.”

A rolled and filleted loin of meat; also called cannon.

“a canon of beef or lamb”

A large size of type formerly used for printing the church canons, standardized as 48-point.

The part of a bell by which it is suspended; the ear or shank of a bell.

A carom.

A clergy member serving a cathedral or collegiate church.

A canon regular, a member of any of several Roman Catholic religious orders.

A Near Eastern and Caucasian musical instrument related to the zither, dulcimer, or harp having either 26 strings and a single bridge, or twice that number and two bridges.