A professor (of Latin ordinarius properly, tidy ') is a church official, the ordinary from his office out executive power has. A local ordinary ( diocesan bishop or his deputy) exercises general authority within his territory .
In the Latin Church , according to can. 134 CIC on the local ordinaries endowed with general executive power, in addition to the Pope, the diocesan bishops and other heads of a particular church or an equivalent community as well as those who have general, regular executive power in these ( general and episcopal vicars ). The higher superiors of clerical religious institutes of papal law and clerical societies of apostolic life of papal law, which have ordinary executive power, are ordinary for the members of the respective community.
The authority of a professor, particularly a local ordinary is Ordinariat called.
- Ulrich Rhode: Church Law, Kohlhammer Verlag, p. 174, 
- Art. Ordinarius (Oberhirt) , in Ilona Riedel-Spangenberger : Basic Concepts of Church Law, Paderborn 1992, (UTB for science; Uni-Taschenbücher 1618), ISBN 3-8252-1618-7 , pp. 179f.