Pop-under Definition
pŏpŭndər
noun
A pop-up advertisement that opens behind the active window of a web browser so that the advertisement is not usually seen until the active window is closed.
American Heritage
Other Word Forms of Pop-under
Noun
Singular:
pop-underPlural:
pop-undersOrigin of Pop-under
On the model of pop-up
From American Heritage Dictionary of the English Language, 5th Edition
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