What is "plough horse"

Usage examples of "plough horse".

I had a sight of a man on a plough horse with dangling harness coming up from somewhere, of the man leaping off, of ourselves being pitched on the animal’.

He clicked his tongue, curbed the plough horse's speed, and let the cart climb the steady slope to the village.

Any creature in peril of death or harm, be it man, woman, plough horse, or Saint Melangells hare, could draw him through moss or quicksand.

Any creature in peril of death or harm, be it man, woman, plough horse, or Saint Melangell’.

It was so quiet Liath could hear the soft wind rustling in the trees and the stamp of the old plough horse in the inn stables.