kil·der·kin (k?l?d?r-k?n)n.1. A cask.2. An obsolete English measure of capacity equal to 18 imperial gallons (81.8 liters).[Middle English, alteration of Middle Flemish kinderkin, variant of Middle Dutch kindekijn : quintel, quintlein, quintal (from Medieval Latin quint?le; see quintal) + -kijn, diminutive suff.]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.kilderkin (?k?ld?k?n) n1. (Units) an obsolete unit of liquid capacity equal to 16 or 18 Imperial gallons or of dry capacity equal to 16 or 18 wine gallons2. a cask capable of holding a kilderkin[C14: from Middle Dutch kindekijn, from kintal hundredweight, from Medieval Latin quintale; see kentledge]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Kilderkin a measured capacity, usually the fourth part of a tun.Examples: kilderkin of corn, 1600; of drink, 1670; of herrings, 1423; of knowledge, 1593; of wit, 1682.Dictionary of Collective Nouns and Group Terms. Copyright 2008 The Gale Group, Inc. All rights reserved.