from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The horse that goes between the thills, or shafts, and supports them.
- n. The last horse in a team.
from the GNU version of the Collaborative International Dictionary of English
- n. The horse which goes between the thills, or shafts, and supports them; also, the last horse in a team; -- called also thill horse.
from The Century Dictionary and Cyclopedia
- n. A thill-horse. Compare wheeler.
thill + -er (Wiktionary)