(1):

(n.) The process of preserving fodder (such as cornstalks, rye, oats, millet, etc.) by compressing it while green and fresh in a pit or vat called a silo, where it is kept covered from the air; as the ensilage of fodder.

(2):

(v. t.) To preserve in a silo; as, to ensilage cornstalks.

(3):

(n.) The fodder preserved in a silo.