rein up

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 there; before his eyes, lying on her back in the middle of the road. He reined up, and the hallucination disappeared.

"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.