from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An adviser or counselor, especially to a capo or leader of an organized crime syndicate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A counselor or advisor, especially to Mafia bosses.
Italian, from Latin cōnsiliārius, from cōnsilium, advice.(American Heritage® Dictionary of the English Language, Fourth Edition)
Italian consiglio, "advice", "counsel", from Latin consilium. (Wiktionary)