1) to disclose or make known something secret
1a) in a forensic sense, to inform, report
2) to declare, tell, make known
3) to indicate, intimate
3a) of a teacher
Part of Speech: verb
Probably from the same base as G3145 and G3415 (that is, μάω maô [to strive]); to disclose (through the idea of mental effort and thus calling to mind), that is, report, declare, intimate: - shew, tell.
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 μηνύω; click on the second column to search for that grammatical form of the root μηνύω; click on the third column to search for that word and grammatical form; click on the total to search for the root μηνύω.