passed ball 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.
Baseball a misplay by the catcher in which a pitch that could be caught or controlled is missed and a base runner advances to another base as a result
passed ball definition by American Heritage Dictionary
A pitch that should have been fielded by the catcher but was missed, allowing a runner to advance a base.