Meaning of CANONICAL in English
[ kə'nɒnɪk(ə)l ]
1》 according to or ordered by canon law.
2》 accepted as being accurate and authoritative.
3》 relating to a cathedral chapter or a member of it.
■ noun ( ~s ) the prescribed official dress of the clergy.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004