Home › Words › G › graystonegraystonegraystone means A type of gray volcanic rock, typically containing feldspar and iron.EtymologyFrom gray + stone.nounA type of gray volcanic rock, typically containing feldspar and iron.Any type of gray stone, such as limestone, used in building.A building of this kind.e.g.“Because graystones were more expensive to build than frame buildings and had a more substantial look and feel, they were the choice of the middle and upper classes.” — 2017, Terry Moor, Reinventing an Urban Vernacular:Definitions & examples from Wiktionary (CC BY-SA 3.0).