the correction of something bad or defective.
Origin of remediation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the action of remedying something, esp the reversal or stopping of damage to the environment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1818, noun of action from stem of Latin remediare, from span class="foreign">remedium (see remedy (n.)). In educational jargon from c.1975.
Online Etymology Dictionary, © 2010 Douglas Harper