noun 1.Also, piaf·fer. a cadenced trot executed on one spot, with a well-elevated leg action.
verb (used without object) 2.(of a horse) to execute such a
movement.
3.(of a rider) to cause a horse to piaffe.
verb (used with object) 4.to cause (a horse) to piaffe.
Origin:
1755–65; < French piaffer; imitative