A map of down under.Licensed from iStockPhoto
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Informal in or into Australia or New Zealand
Used by arrangement with John Wiley & Sons, Inc.
adverb InformalThe 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.
To or in Australia or New Zealand.noun
often Down Under Australia and often New Zealand.