reining up

Verb

rein up (third-person singular simple present reins up, present participle reining up, simple past and past participle reined up)

1. (intransitive) To bring a ridden animal to a halt by pulling on the reins.
   • 1856: Gustave Flaubert, Madame Bovary, Part III Chapter X, translated by Eleanor Marx-Aveling
     He said to himself that no doubt they would save her; the doctors would discover some remedy surely. He remembered all the miraculous cures he had been told about. Then she appeared to him dead. She was...
2. (transitive) To fit reins on (a horse).
   • "Well," said York, "if they come here, they must wear the bearing rein. I prefer a loose rein myself, and his lordship is always very reasonable about horses; but my lady—that's another thing, she will have style; and if her carriage horses are not reined up tight, she wouldn't look at them.[…]"[1877], Anna Sewell, “Earlshall”, in Black Beauty: […], London: Jarrold and Sons, […], →OCLC, part II, page 103
3. (transitive) To stop, to cause to come to a halt.