1) to ordain besides, to add something to what has been ordained
Part of Speech: verb
Middle voice from G1909 and G1299; to appoint besides, that is, supplement (as a codicil): - add to.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ἐπιδιατάσσομαι; click on the second column to search for that grammatical form of the root ἐπιδιατάσσομαι; click on the third column to search for that word and grammatical form; click on the total to search for the root ἐπιδιατάσσομαι.