originally. A large powerful horse, ridden in battle, in a tournament, etc.; a charger.

a courser. Cf. stirrer, n. 3b, stirring, n. 3b.

A horse trained or bred for running; a horse considered in regard to its running ability (frequently with modifying word). Later also (Horse Racing)…

A person or animal that moves briskly; one who bestirs himself, an active person. †Of a horse: see stirring, n. 3b, stirring, adj. 2b.

dialect and colloquial. A horse which travels quickly and smartly; a fast-going horse.

A fast horse. Obsolete.

A showy, fast horse. rare (archaic in later use).

One who or that which clips, moves swiftly, or scuds along; (cf. clip, v.2 7). A swift horse. (Sometimes more indefinitely, as in c.)

An animal (esp. a horse) that can go quickly or for long distances. Frequently (and earliest) in good traveller. Cf. travel, v. 11.

A horse with a turn for speed.

colloquial. A fast horse. Obsolete. rare.