canon (n.) 1
law, decree, rule
Cor I.x.26 [Aufidius to First Soldier, of Coriolanus] Where I find him, were it ... / Against the hospitable canon, would I / Wash my fierce hand in's heart
Ham I.ii.132 [Hamlet alone] Or that the Everlasting had not fixed / His canon 'gainst self-slaughter
LLL I.i.251 [King reading Armado's letter to him, of Costard and Jaquenetta] contrary to thy established proclaimed edict and continent canon
TNK I.ii.55 [Palamon to Arcite] What canon is there / That does command my rapier from my hip [Q Cannon]