Soil v. t. [imp. & p. p. Soiled p. pr. & vb. n. Soiling.] 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.
n : the act of soiling something [syn: soilure, dirtying]