1) to nod to, signify or express by a nod or a sign
Part of Speech: verb
From G1722 and G3506; to nod at, that is, beckon or communicate by gesture: - make signs.
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 ἐννεύω; click on the second column to search for that grammatical form of the root ἐννεύω; click on the third column to search for that word and grammatical form; click on the total to search for the root ἐννεύω.