1. A lump of hard consolidated mineral matter; SYN. stone.
2. Material consisting of the aggregate of minerals like those making up the Earth's crust; SYN. stone.
3. Pitching dangerously to one side; SYN. careen, sway, tilt.
4. Constituent of the Earth's crust, composed of mineral particles and/or materials of organic origin consolidated into a hard mass as igneous, sedimentary, or metamorphic rocks.