Definition of singletree in English English dictionary
A bar behind draft animals and in front of a load, such as a wagon, that balances the load. Generally the animals are attached at the ends and the wagon or other load to a pivot in the middle of the singletree
{i} whiffletree, pivoting horizontal bar to which the straps of a horse's harness are attached
The pivoted or swinging bar to which the traces of a harnessed horse are fixed; a whiffletree