Mer·o·vin·gi·an (m?r??-v?n?j?-?n, -j?n) A Frankish ruling dynasty (c. ad 450-751) founded by Merovech (fl. fifth century) and brought to prominence by Clovis I.Mer?o·vin?gi·an 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.Merovingian (?m?r???v?nd???n) adj (Historical Terms) of or relating to a Frankish dynasty founded by Clovis I, which ruled Gaul and W Germany from about 500 to 751 adn (Historical Terms) a member or supporter of this dynasty[C17: from French, from Medieval Latin Merovingi offspring of Merovaeus, Latin form of Merowig, traditional founder of the line]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014