Meanings
nounpop-under (plural pop-unders)
plural pop-unders · alternative popunder
- InternetA pop-up advertisement that appears behind the window that triggers its appearance, and thus cannot initially be seen.
Cite this entry
APA
pop-under. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/pop-under
MLA
“pop-under.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/pop-under. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “pop-under,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/pop-under.
Source: pop-under on Wiktionary, CC BY-SA 4.0.