Definition of "undeliverable" []

• Difficult or impossible to deliver: undeliverable mail. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In December, this goes up to 70 per cent, including a significant number known here as "undeliverable" - the sort of thing addressed "Grandad"."
• "As per our Purchasing Terms, if for any reason your order is classified as undeliverable and returned to Clique, you will be notified via email that your order has been canceled due to a failed delivery attempt and you will be issued a refund of your order subtotal."
• "Clique will NOT re-ship any order that is classified as undeliverable and returned to us."