from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One of a breed of strong saddle horses developed in the western United States.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An American breed of horse originally bred for short-distance racing.
From its formerly being trained for races up to a quarter mile.(American Heritage® Dictionary of the English Language, Fourth Edition)
I was still riding Misty bareback, but Maureen had switched to a nice quarter horse named Ash Bill.