gravel

Short definition from Wiktionary

Noun

1. 1
   Small fragments of rock, used for laying on the beds of roads and railways, and as ballast.
2. 2
   A type or grade of small rocks, differentiated by mineral type, size range, or other characteristics.
3. 3
   A particle from 2 to 64 mm in diameter, following the Wentworth scale.
4. 4
   Kidney stones; a deposit of small calculous concretions in the kidneys and the urinary or gall bladder; also, the disease of which they are a symptom.
5. 5
   A lameness in the foot of a horse, usually caused by an abscess.
6. 6
   Inability to see at night; night blindness.
7. 7
   Gravel cycling, a discipline in cycling different from road cycling, mountain biking or cyclocross, for a large part on gravel roads, typically with a dedicated gravel bike.
8. 8
   The stimulant drug alpha-pyrrolidinopentiophenone.

Verb

1. 1
   To apply a layer of gravel to the surface of a road, etc.
2. 2
   To puzzle or annoy.
3. 3
   To run (as a ship) upon the gravel or beach; to run aground; to cause to stick fast in gravel or sand.
4. 4
   To check or stop; to confound; to perplex.
5. 5
   To hurt or lame (a horse) by gravel lodged between the shoe and foot.
6. 6
   To prostrate; to beat to the ground.

Proper noun

1. 1
   A surname.