a Christian priest with special duties in a cathedral 座堂区府 - (formal)
a generally accepted rule, standard or principle by which something is judged 原则；准则；标准 the canons of good taste 衡量高雅趣味的标准 market sovereignty, the central canon of Thatcherism 市场主权，撒切尔主义的核心原则
a list of the books or other works that are generally accepted as the real work of a particular writer or as being important （某作家的）真作，精品 a piece of music in which singers or instruments take it in turns to repeat the melody (= tune) 两重轮唱（或演奏）；卡农曲 a canon for tenor and bass 男高音和男低音的经典
Word Originsenses 2 to 4 Old English: from Latin, from Greek kanōn ‘rule’, reinforced in Middle English by Old French canon.sense 1 Middle English (in the sense ‘regular’): from Old French canonie, from Latin canonicus ‘according to rule’ from Greek kanonikos, from kanon ‘rule’.