cosa nostra cos lettuce • cosa-sapere · · · Info · Definitions · Characters · · cosa nostra · · Text Common · · Latin · · Scripts 11 · · Length 4 · · Syllables Definitions · · · (noun) a crime syndicate in the United States; organized in families; believed to have important relations to the Sicilian Mafia. Synonyms: Mafia, Maffia, Cosa Nostra. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074