WordWeb Online

1. Appearing in a biblical canon
   "a canonical book of the Christian New Testament"
   - canonic
    
2. Of or relating to or required by canon law
   - canonic
    
3. Reduced to the simplest and most significant form possible without loss of generality
   "a canonical syllable pattern"
   - basic, canonic
    
4. Conforming to orthodox or recognized rules
   "the drinking of cocktails was as canonical a rite as the mixing"
   - canonic, sanctioned

See also: canon, canon law, canonically, orthodox, standard

Encyclopedia: Canonical