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A legal doctrine that bars a claimant from receiving relief where the claimant's delay in pursuing the claim has operated to the prejudice of the opposing party.
[Middle English, slackness, negligence, from Anglo-Norman lachesse, laches, from Old French laschesse, from lasche, loose, remiss; see lush1.]
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.
(Law) law negligence or unreasonable delay in pursuing a legal remedy
[C14 lachesse, via Old French lasche slack, from Latin laxus lax]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n. (used with a sing. v.)
Law. unreasonable delay, as in asserting a right or claim.
[1325–75; Middle English lachesse < Anglo-French; Middle French laschesse, derivative of Old French lasche slack (< Germanic); see -ice]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.