IPA: /nɒnˈkænɪkəl/
KK: /nɑnˈkænɪkəl/
Not included in the accepted or traditional set of works or rules; outside the standard or recognized group.
The author's latest book presents a noncanonical perspective on the historical events.
Noncanonical → It is formed from "non-" (meaning not) and "canonical" (from Greek "kanonikos", meaning according to a rule or standard). The word "noncanonical" refers to something that does not conform to established rules or standards.
Think of 'non-' meaning 'not' and 'canonical' relating to a rule or standard — so noncanonical describes something that is not following the usual rules.