(1):

(v. i.) A rope secured to a yard, with a thimble in its lower end for supporting a footrope.

(2):

(v. i.) A kind of ring, or bent piece of metal, wood, leather, or the like, horizontal in one part for receiving the foot of a rider, and attached by a strap to the saddle, - used to assist a person in mounting a horse, and to enable him to sit steadily in riding, as well as to relieve him by supporting a part of the weight of the body.

(3):

(v. i.) Any piece resembling in shape the stirrup of a saddle, and used as a support, clamp, etc. See Bridle iron.