Qu'est-ce qu'un spur? Qu'est-ce qu'un spur? A short spike or spiked wheel that attaches to the heel of a rider's boot and is used to urge a horse forward.Something that serves as a goad or incentive.A spurlike attachment or projection, as: A spinelike process on the leg of some birds.A climbing iron; a crampon.A gaff attached to the leg of a gamecock.A short or stunted branch of a tree.A bony outgrowth or protuberance.A lateral ridge projecting from a mountain or mountain range.An oblique reinforcing prop or stay of timber or masonry.Botany A tubular or saclike extension of the corolla or calyx of a flower, as in a columbine or larkspur.An ergot growing on rye.A spur track.To urge (a horse) on by the use of spurs.To incite or stimulate: "A business tax cut is needed to spur industrial investment” ( New York Times). To ride quickly by spurring a horse.To proceed in haste.