day-glo

proper noun

A luminous paint that glows in a variety of brilliant colours, most commonly red or orange; used especially for outdoor advertising.

Similar
blacklight inkblacklight-reactive inkluminous paintfluorescent paint

Meanings

day-glo1

adjectiveday-glo (comparative more day-glo, superlative most day-glo)

comparative more day-glo · superlative most day-glo

  1. alternativeAlternative form of Day-Glo; luminescent; fluorescent; of colors, very bright.

    And watched the world turn day-glo / You know you know / The world turned day-glo

    1978, “The Day the World Turned Day-Glo”, performed by X-Ray Spex

Day-Glo2

proper noun

alternative Dayglo · alternative day-glo · alternative dayglo

  1. A luminous paint that glows in a variety of brilliant colours, most commonly red or orange; used especially for outdoor advertising.

    Cool shades and Day-Glo tears / All hide your sixteen years

    1980, “Spring Collection”, in New Clear Days, performed by The Vapors

    Synonyms: blacklight ink, blacklight-reactive ink, luminous paint, fluorescent paint

adjectiveDay-Glo (not comparable)

alternative Dayglo · alternative day-glo · alternative dayglo

  1. colloquialnot comparableVery bright and luminous in colour.

    Leon was in his most resplendent, gaudiest, Day-Glo getup, including a purple felt fez with multiple hangy-downs and a cranberry vestment with gold collar, appliquéd with every religious symbol known to man […]

    2011, Tim LaHaye, Jerry B. Jenkins, Glorious Appearing: The End of Days
    1 more example

    The chip smells like nothing, but tastes like a smörgåsbord that’s both confusing and arousing, like Steve Buscemi. Flecks of spring green – the kind generated from radioactive waste – coat the unwieldy triangles. The seasoning is a kaleidoscope of Day-Glo dust particles that perishes under saliva and tongue.

    2022 April 20, Mariella Rudi, “Tostitos Hint of Lime has zero lime – but it’s still the perfect chip”, in The Guardian

Synonyms & antonyms

proper nounA luminous paint that glows in a variety of brilliant colours, most commonly red or orange; used especially for outdoor advertising.

Similar
blacklight inkblacklight-reactive inkluminous paintfluorescent paint

Origin

Coined by the Day-Glo Color Corp., originally as a trademark, from day + glow.

Full word history & related roots →
Cite this entry
APA

day-glo. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/day-glo

MLA

“day-glo.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/day-glo. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “day-glo,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/day-glo.

Source: day-glo on Wiktionary, CC BY-SA 4.0.