Sentence:  For an instant John longed for the sound of the bells of Noyon-la-Sainte , the touch of his mother 's hand , the lilt of Charles 's voice in the square raftered rooms , his father 's bass tones rumbling to the <WSD>canons</WSD> , and the sight of the beloved bishop . 
Meaning of the word marked with <WSD> tags:  a rule or especially body of rules or principles generally established as valid and fundamental in a field or art or philosophy