Definition of "scouring"

Another for a violent scouring. Take the Entrails of a Pullet, or great Chicken, all but the Gizzard, and mix with tbem of Spikenard one Ounce, ' and make him swallow it, and this will infallibly stay his Scouring, yea, though it be a Bloody-Flux.

1720, E. R. (Gent.), The Experienc'd Farrier: Or Farring Compleated. Containing Every Thing that Belongs to a Compleat Horseman, page 332

For that kind of lax and scouring called bloody flux, see the article BLOODY FLUX.

1766, Thomas Wallis (surgeon), The Farrier's and Horseman's Complete Dictionary: Containing the Art of Farriery in All Its Branches

Thus in 1670 the London bills ascribe 142 deaths to “bloody flux, scouring, and flux,” and 3,690 to “griping in the guts.”

1840, London Medical Gazette: Or, Journal of Practical Medicine, page 683

Flux, bloody flux and scouring feature from the first, but were overtaken in the 1650s by 'plague in the guts', soon renamed 'griping in the guts'. An apparent decline in bloody flux was more than matched by high levels of 'griping in the guts'.

2011, V. Berridge, M. Gorsky, Environment, Health and History, Springer, page 37

It was also found that scouring had occurred in the bed of the mill lade, which passes between the first and second piers.

1950 January, “Re-Opening of the Eyemouth Branch”, in Railway Magazine, page 11