—n. 1. a U-shaped device that slips over and straps to the heel of a boot and has a blunt, pointed, or roweled projection at the back for use by a mounted rider to urge a horse forward.
2. anything that goads, impels, or urges, as to action, speed, or achievement.
3. See climbing iron. 4. Ornith.a stiff, usually sharp, horny process on the leg of various birds, esp. the domestic rooster, or on the bend of the wing, as in jacanas and screamers.
5. Pathol.a bony projection or exostosis.
6. a sharp piercing or cutting instrument fastened to the leg of a gamecock in cockfighting; gaff.
7. Physical Geog.a ridge or line of elevation projecting from or subordinate to the main body of a mountain or mountain range.
8. something that projects and resembles or suggests a gaff; sharp projection.
9. a short or stunted branch or shoot, as of a tree.
10. Typography.a short, seriflike projection from the bottom of the short vertical stroke in the capital G in some fonts.
11. See wing dam. 12. Bot. a. a slender, usually hollow, projection from some part of a flower, as from the calyx of the larkspur or the corolla of the violet.
b. a short shoot bearing flowers, as in fruit trees.
13. Archit. a. a short wooden brace, usually temporary, for strengthening a post or some other part.
b. any offset from a wall, as a buttress.
14. Ceram.a triangular support of refractory clay for an object being fired.
15. Railroads.See spur track. 16. on the spur of the moment, without deliberation; impulsively; suddenly: We headed for the beach on the spur of the moment. 17. win one's spurs, to achieve distinction or success for the first time; prove one's ability or worth: Our team hasn't won its spurs yet.
—v.t. 1. to prick with or as if with a spur or spurs; incite or urge on: The rider spurred his mount ruthlessly. Appreciation spurs ambition. 2. to strike or wound with the spur, as a gamecock.
3. to furnish with spurs or a spur.
—v.i. 1. to goad or urge one's horse with spurs or a spur; ride quickly.
2. to proceed hurriedly; press forward: We spurred onward through the night.
Pronunciation: (spûr),[key] —n.Papermaking. a batch of newly made rag-paper sheets.