(music) A canon with two simultaneous themes.

(printing, dated) Synonym of canon.

(psychology, zoology) A fundamental precept of comparative animal psychology, stating that an animal's activity should not be interpreted in terms of higher psychological processes if it can be fairly interpreted in terms of simpler developmental processes.

plural of canonical ensemble

(statistical mechanics) The statistical ensemble that represents the possible states of a mechanical system in thermal equilibrium with a heat bath at a fixed temperature.

(Christianity) The obedience, as regulated by the canons, of one ecclesiastic to another of higher rank.

(Christianity) A cleric in orders, attached to a cathedral and having the duty of assisting the canons in singing divine service.

(fandom slang) Secondary material, such as official novels based on a television series, that may or may not be regarded as canon.

(Roman Catholicism) The oldest anaphora used in the Roman rite of Mass.

A village in East Devon district, Devon, England (OS grid ref SX9398).