Adjective

• 1. appearing in a Biblical canon;

  "a canonical book of the Christian New Testament"

• 2. of or relating to or required by canon law

• 3. reduced to the simplest and most significant form possible without loss of generality;

  "a basic story line"

  "a canonical syllable pattern"

• 4. conforming to orthodox or recognized rules;

  "the drinking of cocktails was as canonical a rite as the mixing"- Sinclair Lewis