marsh·mal·low (märsh?m?l??, -m?l??)n.1. a. A light, spongy, very sweet confection made of corn syrup, gelatin, sugar, and often vanilla.b. A confection of sweetened paste, formerly made from the root of the marshmallow plant.2. often marsh mallow A perennial plant (Althaea officinalis) in the mallow family, native to Eurasia and naturalized in eastern North America, having pink flowers and a mucilaginous root used in herbal medicine and formerly in confections.marsh?mal?low·y adj.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.marshmallow (?m????mæl??) n1. (Cookery) a sweet of a spongy texture containing gum arabic or gelatine, sugar, etc2. (Cookery) a sweetened paste or confection made from the root of the marsh mallow ?marsh?mallowy adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014marsh? mal`low n. an Old World mallow, Althaea officinalis, having pink flowers, found in marshy places. [before 1000] marsh?mal?low (?m?r??m?l o?, -?mæl o?) n. 1. a spongy confection made from gelatin, sugar, corn syrup, and flavoring. 2. a sweetened paste made from the root of the marsh mallow. [1905?10] marsh?mal`low?y, adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.