Definitions from Wiktionary ( )

▸ noun:  (uncountable) Small fragments of rock, used for laying on the beds of roads and railways, and as ballast.
▸ noun:  A type or grade of small rocks, differentiated by mineral type, size range, or other characteristics.
▸ noun:  (uncountable, geology) A particle from 2 to 64 mm in diameter, following the Wentworth scale.
▸ noun:  (uncountable, archaic) 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.
▸ noun:  A lameness in the foot of a horse, usually caused by an abscess.
▸ noun:  (rare) Inability to see at night; night blindness.
▸ noun:  (uncountable, cycling) 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.
▸ noun:  (slang) The stimulant drug alpha-pyrrolidinopentiophenone.
▸ verb:  (transitive) To apply a layer of gravel to the surface of a road, etc.
▸ verb:  (transitive) To puzzle or annoy.
▸ verb:  (transitive) To run (as a ship) upon the gravel or beach; to run aground; to cause to stick fast in gravel or sand.
▸ verb:  (transitive) To check or stop; to confound; to perplex.
▸ verb:  (transitive) To hurt or lame (a horse) by gravel lodged between the shoe and foot.
▸ verb:  (transitive, slang, archaic) To prostrate; to beat to the ground.
▸ noun:  A surname.

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