Added 10 October 2026 paperboard noun Categories: NatureRare Words noun ! Definition from Wiktionary (CC BY-SA). More about paperboard at Wordnik → Where our words come from → A thick paper, or thin cardboard. Origin From paper + board. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: posterboardcardboardcartonboardboxfibreboardsackpaperjacketbunchbadgeinset Back to today's word