Noun
The ensemble of customs, mentality and attitudes traditionally attributed to Sicilians.
(linguistics) A word or phrase identified as being Sicilian (language or Italian dialect), as written in Sicily or by a Sicilian, or as expressive of Sicilian mentality or attitudes.
(politics) Sicilian nationalism; a political movement within Sicily, and to some extent in the Sicilian diaspora, which seeks greater autonomy or even full independence for Sicily from Italy and promotes Sicilian identity in terms of culture, history and language; also used historically.
Source: en.wiktionary.org