Source : Webster's Revised Unabridged Dictionary (1913)

Sicilian \Si*cil"i*an\, a.
   Of or pertaining to Sicily or its inhabitants.

   {Sicilian vespers}, the great massacre of the French in
      Sicily, in the year 1282, on the evening of Easter Monday,
      at the hour of vespers.

Sicilian \Si*cil"i*an\, n.
   A native or inhabitant of Sicily.

Source : WordNet®

Sicilian
     adj : of or relating to or characteristic of Sicily or the people
           of Sicily; "the Sicilian Mafia"

Sicilian
     n : a resident of Sicily