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Related to nixie: Nixie tube
nix·iealso nix·y (nĭk′sē)
n. pl. nix·ies Slang
A misaddressed or illegibly addressed piece of mail, therefore undeliverable.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(European Myth & Legend) German myth a female water sprite, usually unfriendly to humans
[C19: see nix]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a letter or parcel that is undeliverable because of a faulty or illegible address.
a female nix.
[1810–20; < German Nixe (Middle High German nickese, Old High German nicchessa; see nix2)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
nixie- Any piece of mail that is unable to be forwarded because it is illegibly or incorrectly addressed.
See also related terms for mail.
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.