noun
plural -ons
[count] formal :an accepted rule or guide about how people should behave or about how something should be done
a group of books, poems, plays, etc., that are traditionally considered to be very important
the group of books, poems, plays, etc., that a particular author is known to have written
a list of books that are considered to be part of a religion's official text
a piece of music in which the same melody is started at different times by each of the different groups of voices or instruments - compare 2canon
noun
plural -ons
[count] :a Christian priest who works in a cathedral - compare 1canon