Search Result for "omerta": 
Wordnet 3.0

NOUN (1)

1. a code of silence practiced by the Mafia; a refusal to give evidence to the police about criminal activities; 



WordNet (r) 3.0 (2006):

omerta
    n 1: a code of silence practiced by the Mafia; a refusal to give
         evidence to the police about criminal activities