lightbox

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noun

A box containing a source of light and a white, translucent cover, used to view photographic transparencies.

CommonScrabble 21
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Meanings

nounlightbox (plural lightboxes)

plural lightboxes

  1. A box containing a source of light and a white, translucent cover, used to view photographic transparencies.
  2. A box containing fluorescent tubes or LED technology, used to treat people with seasonal affective disorder (SAD) and circadian rhythm disorders.
  3. InternetA kind of pop-up that is overlaid across a web page while the rest of the content is dimmed.
  4. pinballA backbox.
  5. A device used in phreaking that indicates when a telephone line is in use by means of a light.

Synonyms & antonyms

Also see
backbox

Origin

From light + box. In the Internet sense, originally the name of one specific technique.

Full word history & related roots →
Cite this entry
APA

lightbox. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/lightbox

MLA

“lightbox.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lightbox. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “lightbox,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/lightbox.

Source: lightbox on Wiktionary, CC BY-SA 4.0.