Tiber definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
river in central Italy, flowing from the Apennines south through Rome into the Tyrrhenian Sea: c. 250 mi (402 km)
Origin: Classical Latin Tiberis
Tiber definition by American Heritage Dictionary
A river of central Italy flowing about 406 km (252 mi) south and southwest through Rome to the Tyrrhenian Sea at Ostia.