The River Arno in Florence.Licensed from iStockPhoto
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
river in Tuscany, central Italy, flowing west into the Ligurian Sea: c. 150 mi (241 km)
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A river of central Italy rising in the northern Apennines and flowing about 241 km (150 mi) to the Ligurian Sea. Flooding of the Arno has caused severe damage to art treasures in Florence.