single-foot(n = noun.act) rack - a rapid gait of a horse in which each foot strikes the ground separately;
is a kind of gait
Derived form verb single-foot₁

   single-foot(v = verb.motion) rack - go at a rack; "the horses single-footed"
is one way to pace
Derived form noun single-foot₁
Sample sentences: Something ----s

   An irregular gait of a horse; -- called also single-footed pace. See Single, v. i. [1913 Webster]
"Single-foot is an irregular pace, rather rare, distinguished by the posterior extremities moving in the order of a fast walk, and the anterior extremities in that of a slow trot." [1913 Webster]

   To proceed by means of the single-foot, as a horse or other quadruped. [Webster 1913 Suppl.]