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1. A short spike or spiked wheel that attaches to the heel of a rider's boot and is used to urge a horse forward.
2. An incentive: a spur to action.
3. A spurlike attachment or projection, as:
a. A spinelike process on the leg of some birds.
b. A climbing iron; a crampon.
c. A gaff attached to the leg of a gamecock.
d. A short or stunted branch of a tree.
e. A bony outgrowth or protuberance.
4. A lateral ridge projecting from a mountain or mountain range.
5. An oblique reinforcing prop or stay of timber or masonry.
6. Botany A tubular or saclike extension of the corolla or calyx of a flower, as in a columbine or larkspur.
7. An ergot growing on rye.
8. A spur track.
v. spurred, spur·ring, spurs
1. To urge (a horse) on by the use of spurs.
2. To incite or stimulate: "A business tax cut is needed to spur industrial investment" (New York Times).
To ride quickly by spurring a horse.

[Middle English spure, from Old English spura; see sperə- in Indo-European roots.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spurring - a verbalization that encourages you to attempt somethingspurring - a verbalization that encourages you to attempt something; "the ceaseless prodding got on his nerves"
encouragement - the expression of approval and support
References in classic literature ?
What a situation, now, for a patriotic senator, that had been all the week before spurring up the legislature of his native state to pass more stringent resolutions against escaping fugitives, their harborers and abettors!
There was spurring and splashing through the darkness, and bridle was drawn in the space by the village fountain, and the horse in a foam stood at Monsieur Gabelle's door.
Their visors closed, their lances in the rest, Or at the helmet pointed or the crest, They vanish from the barrier, speed the race, And spurring see decrease the middle space.