1) to announce or proclaim be herald beforehand
2) to announce beforehand (of the herald himself)
Part of Speech: verb
Citing in TDNT: 3:717, 430
From G4253 and G2784; to herald (that is, proclaim) in advance: - before (first) preach.
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 προκηρύσσω; click on the second column to search for that grammatical form of the root προκηρύσσω; click on the third column to search for that word and grammatical form; click on the total to search for the root προκηρύσσω.