Added 9 October 2026 hardbound adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. More about hardbound at Wordnik → Where our words come from → Having a hard back or cover. hardback books Origin Compound of hard + bound. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: hardbackedhardbackhardcoverbackedhdbkhard-shellhide-boundhardlinehard-headedhardsetcase-hardenedhardwood Back to today's word