Old Castile 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.
Old Castile definition by American Heritage Dictionary
A historical region of north-central Spain that combined with New Castile to the south to form the kingdom of Castile. It was united with Aragon after the marriage of Ferdinand and Isabella (1469).