Added 10 October 2026 hardrock noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about hardrock at Wordnik → Where our words come from → Rock containing ore from which minerals are extracted. Solid, nonporous rock. A type of concrete that contains relatively small amounts of aggregate relative to the amount of cement. Origin From hard + rock. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: anorthositewollastonitelodemetallogenicgossanpyroxeniteminerallateriticmetalliferousunminedauriferous Back to today's word