Of a horse: that is or has been ridden upon; broken-in. Also: (Equestrianism) designating a class of horse in a horse show.

With preceding adverb indicating the degree to which a horse or other animal is broken in or disciplined, esp. in well reined. Also occasionally…

participle and adj. Supported at the back, seconded, abetted; betted on; mounted, broken in to the saddle; endorsed, printed on the back; moved or…

Of a horse: ridden. Only in well rid and as postmodifier. Obsolete.

Of a horse: having a good gait or manner of walking.