1. Relating to the island of Sicily: This is the most common meaning. It refers to anything connected to the island of Sicily, Italy, including its people, culture, language, food, and history.
2. A native of Sicily: This refers specifically to someone who was born and raised on the island of Sicily.
So, "Sicilian" can be used as an adjective (describing something) or as a noun (referring to a person). For example:
* "Sicilian food is known for its bold flavors." (adjective)
* "My grandfather was a Sicilian immigrant." (noun)