Real Dictionary

spur
Something that acts as a spur to something else encourages a person or organization to do that thing or makes it happen more quickly.
Spurs are small metal wheels with sharp points that are attached to the heels of a rider's boots. The rider uses them to make their horse go faster.
countable noun: The spur of a hill or mountain is a piece of ground which sticks out from its side.
verb: If one thing spurs you to do another, it encourages you to do it.
verb: If something spurs a change or event, it makes it happen faster or sooner.

spur in American English
any of various pointed devices worn on the heel by the rider of a horse and used to urge the horse forward
to strike or prick with a spur or spurs

spur in American English 1
noun: 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

spur in American English 2
noun: a batch of newly made rag-paper sheets