Definition of red stone in US English:

red stone


  • 1Alchemy. The red form of the philosopher's stone. Now historical.

  • 2Now usually in form redstone. Any of various rocks of a red colour, especially a sandstone or other reddish sedimentary rock suitable for use as a building stone.


Old English (in an earlier sense). From red + stone.


red stone

/ˈrɛd ˌstəʊn/