The hard, solid, nonmetallic mineral matter of which rock is made, especially as a building material. A piece of stone shaped for a purpose, especially one of commemoration, ceremony, or demarcation. A hard seed in a cherry, plum, peach, and some other fruits. A unit of weight equal to 14 pounds (6.35 kg). A natural shade of whitish-gray or brownish-gray. Throw stones at. Remove the stone from (a fruit). Build, face, or pave with stone.