A hardy awned cereal (genus Hordeum), cultivated in all parts of the world; used partly as food, and largely (in Britain and the United States, mainly) in the preparation of malt liquors and spirits.
"barley, n.". OED Online. December 2016. Oxford University Press. http://www.oed.com/view/Entry/15594?rskey=0D4lGs&result=1&isAdvanced=false (accessed February 09, 2017).