Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
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.
Origin: Middle English charleswen, Charles' (Charlemagne's) wain, probably reinterpreted from Old English carles wǽgn, churl's wain : carl, churl (from Old Norse karl) + wǽgn, wain; see wain.