Small stones and pebbles, or a mixture of these with sand, used for paths and roads and as an aggregate. The driveway was covered with gravel to provide a stable surface for cars.
Loose, unconsolidated rounded rock fragments larger than sand but smaller than cobbles, typically transported and deposited by water or ice. River channels often contain beds of gravel that have been carried downstream by strong currents.
Small calculi, especially kidney stones, occurring in the urinary tract. The patient was diagnosed with gravel in his kidneys.