Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Boxing a victory won when the opponent, though not knocked out, is so badly hurt that the referee stops the match
Used by arrangement with John Wiley & Sons, Inc.
noun Abbr. TKOThe 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 victory in boxing, with immediate termination of the match, awarded by the referee when it appears that one fighter is too badly injured to continue.