pertaining to, established by, or conforming to a canon or canons.

included in the canon of the Bible.

authorized; recognized; accepted

canonical works.

Mathematics . (of an equation, coordinate, etc.) in simplest or standard form.

following the pattern of a musical canon.

Linguistics . (of a form or pattern) characteristic, general or basic

the canonical form of the past tense; a canonical syllable pattern.

canonicals, garments prescribed by canon law for clergy when officiating.

adjective

unacceptable , unauthorized , uncanonical , unorthodox , unrecognized , unsanctioned

adjective

approved , authoritative , authorized , lawful , legal , official , orthodox , received , sanctioned , sound , statutory , time-honored , accepted , customary , proper