NOUN (1)

1. a specialist in canon law;


ADJECTIVE (1)

1. pertaining to or characteristic of a body of rules and principles accepted as axiomatic; e.g. "canonist communism";

The Collaborative International Dictionary of English v.0.48:

Canonist \Can"on*ist\, n. [Cf. F. canoniste.]
   A professor of canon law; one skilled in the knowledge and
   practice of ecclesiastical law. --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

canonist
    adj 1: pertaining to or characteristic of a body of rules and
           principles accepted as axiomatic; e.g. "canonist
           communism"
    n 1: a specialist in canon law

Bouvier's Law Dictionary, Revised 6th Ed (1856):

CANONIST. One well versed in canon or ecclesiastical law.