From Planet X
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. Something that serves as a goad or an incentive. 3. A spurlike attachment or projection, as: 4. A spinelike process on the leg of some birds. 5. A climbing iron; a crampon. 6. A gaff attached to the leg of a gamecock. 7. A short or stunted branch of a tree. 8. A bony outgrowth or protuberance. 9. A lateral ridge projecting from a mountain or mountain range. 10. An oblique reinforcing prop or stay of timber or masonry. 11. A tubular or saclike extension of the corolla or calyx of a flower, as in a columbine or larkspur. 12. An ergot growing on rye. 13. A spur track. 14. To urge (a horse) on by the use of spurs. 15. New York Times 16. To ride quickly by spurring a horse. 17. To proceed in haste.