Webster's Revised Unabridged Dictionary · 1913

Thill

Thill , noun

[Old English thille, Anglo-Saxon {not transcribed}ille a board, plank, beam, thill; akin to {not transcribed}el a plank, Dutch deel a plank, floor, German diele, Old High German dili, dilla, Icelandic {not transcribed}ilja a plank, planking, a thwart, {not transcribed}ili a wainscot, plank; compare Sanskrit tala a level surface. r236. Compare Fill a thill, Deal a plank.]

1.
One of the two long pieces of wood, extending before a vehicle, between which a horse is hitched; a shaft.
2.
(Mining) The floor of a coal mine. — Raymond
Collocations (1)
Thill coupling , a device for connecting the thill of a vehicle to the axle.