pre- + roll
preroll (countable and uncountable, plural prerolls)
- (film, uncountable) A period of time during which the camera rolls but before the action begins.
- (Internet, advertising, countable) An advertisement that plays before the main content.
2009 July 27, Brooks Barnes, “Lab Watches Web Surfers to See Which Ads Work”, in New York Times:
- Are ads that play before video clips, known as prerolls, more effective when paired with banner ads?
preroll (third-person singular simple present prerolls, present participle prerolling, simple past and past participle prerolled)
- To roll something in advance.
- To make or show a preroll.