Merriam-Webster Collegiate Dictionary - pasture

 I. noun  Etymology: Middle English, from Anglo-French, from Late Latin pastura, from Latin pastus, past participle of pascere to feed — more at food  Date: 14th century  1. plants (as grass) grown for the feeding especially of grazing animals  2. land or a plot of land used for grazing  3. the feeding of livestock ; grazing  II. verb  (~d; pasturing)  Date: 14th century  intransitive verb graze, browse  transitive verb  1. to feed (as cattle) on ~  2. to use as ~