1) to define
1a) to mark out the boundaries or limits (of any place or thing)
1b1) that which has been determined, acc. to appointment, decree
1b2) to ordain, determine, appoint
Part of Speech: verb
Citing in TDNT: 5:452, 728
From G3725; to mark out or bound ("horizon"), that is, (figuratively) to appoint, decree, specify: - declare, determine, limit, ordain.
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 ὁρίζω; click on the second column to search for that grammatical form of the root ὁρίζω; click on the third column to search for that word and grammatical form; click on the total to search for the root ὁρίζω.