1) a noise, tumult, uproar
1a) of persons wailing
1b) of a clamorous and excited multitude
1c) of riotous persons
2) a tumult, as a breach of public order
Part of Speech: noun masculine
From the base of G2360; a disturbance: - tumult, uproar.
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 θόρυβος; click on the second column to search for that grammatical form of the root θόρυβος; click on the third column to search for that word and grammatical form; click on the total to search for the root θόρυβος.