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1. Medicine The inability of a bodily organ or system, especially the circulatory system, to maintain adequate physiological function in the presence of disease.
2. Psychology The inability to maintain defense mechanisms in response to stress, resulting in personality disturbance or psychological imbalance.
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.
to undergo decompensation due to disease or impairment
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014