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[dey-gloh] /ˈdeɪˌgloʊ/
a brand of pigments and other products that exhibit fluorescence in daylight.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Day-Glo


  1. a brand of fluorescent colouring materials, as of paint
  2. (as modifier) Day-Glo colours
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Day-Glo

1951, proprietary name (Dane & Co. of London) for a brand of fluorescent paint.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for Day-Glo



Blatantly gaudy; cheaply flashy: smoldering pageant turns totally day-glo/ plenty of sequins and day-glo fur/ day-glo glamor

[1950s+; fr the trademark of a brand of paint that makes things glow under a black light and produces lurid, psychedelic color effects]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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