"canons" in the noun sense
a rule or especially body of rules or principles generally established as valid and fundamental in a field of art or philosophy
"the neoclassical canon"
"canons of polite society"
a priest who is a member of a cathedral chapter
3. canyon, canon
a ravine formed by a river in an area with little rainfall
a contrapuntal piece of music in which a melody in one part is imitated exactly in other parts
a complete list of saints that have been recognized by the Roman Catholic Church
a collection of books accepted as holy scripture especially the books of the Bible recognized by any Christian church as genuine and inspired
Source: WordNet® (An amazing lexical database of English)
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