fee·ble-mind·ed (f??b?l-m?n?d?d)adj.1. Deficient in intelligence. No longer in scientific use.2. Exhibiting a marked lack of intelligent consideration and forethought: a feeble-minded plan doomed to failure.fee?ble-mind?ed·ly adv.fee?ble-mind?ed·ness n.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.feeble-minded adj 1. lacking in intelligence; stupid 2. (Psychology) mentally defective 3. lacking decision; irresolute ?feeble-?mindedly adv ?feeble-?mindedness nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014fee?ble-mind?ed adj. 1. lacking the normal mental powers. 2. mentally retarded. 3. stupid. 4. Archaic. indecisive. [1525?35] fee?ble-mind?ed?ly, adv. fee?ble-mind?ed?ness, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.