English

Alternative forms

• greystone (mostly UK)

Noun

graystone ‎(plural graystones)

1. (uncountable) A type of gray, volcanic rock, typically containing feldspar and iron
2. A building made of any type of gray stone, such as limestone
   • 2009, January 4, Letters: Mr. Obama’s Neighborhood:

     Founded almost 50 years ago, it's an imposing graystone structure (formerly a park district office).

Related terms

• brownstone