Middle Atlantic States[mĭdˌăt-lănˈtĭk]
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
New York, New Jersey, Pennsylvania, Delaware, and Maryland
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.
also Mid-At·lan·tic States
A region of the eastern United States including New York, Pennsylvania, New Jersey, and usually Delaware and Maryland.