Meaning of SOIL in English

SOIL

( v. t. )

To feed, as cattle or horses, in the barn or an inclosure, with fresh grass or green food cut for them, instead of sending them out to pasture; hence (such food having the effect of purging them), to purge by feeding on green food; as, to soil a horse.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.