popout noun3 •A user interface element that opens a small separate section in front of the main content. •A pop fly that is caught in flight, resulting in an out.And Ambiorix Burgos loaded the bases […] before inducing a popout in foul territory to end the game. — 2007 •A cheap surfboard manufactured from a mold.Popout boards were also available in do-it-yourself kits. Non-popout surfboard manufacturer and retailers viewed popouts as a threat to business […] — 2005 formspopouts