si·lage (s??l?j)n. Fodder prepared by compressing and fermenting green forage crops under anaerobic conditions, usually in a silo.[Short for ensilage.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.silage (?sa?l?d?) n (Agriculture) any crop harvested while green for fodder and kept succulent by partial fermentation in a silo. Also called: ensilage [C19: alteration (influenced by silo) of ensilage]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014si?lage (?sa? l?d?) n. fodder preserved through fermentation in a silo; ensilage. [1880?85; shortening of ensilage, influenced by silo] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.