- the part of the foot of a horse, cow, etc., between the fetlock and the hoof.
- either of the two bones of this part, the upper or first phalanx (great pastern bone, orfetter bone ) and the lower or second phalanx (small pastern bone ), between which is a joint (pastern joint ).
- the part of a horse's foot between the fetlock and the hoof
- either of the two bones that constitute this part