—v.intr.
1 move at an easy pace, in a way suggesting an ambling horse.
2 (of a horse etc.) move by lifting the two feet on one side together.
3 ride an ambling horse; ride at an easy pace.
—n. an easy pace; the gait of an ambling horse.
Etymology: ME f. OF ambler f. L ambulare walk
Useful english dictionary. 2012.