Definify.com
Webster 1913 Edition
Labefaction
Labˊe-fac′tion
,Noun.
 [See 
Labefy
.] The act of labefying or making weak; the state of being weakened; decay; ruin. 
There is in it such a 
labefaction 
of all principles as may be injurious to morality. Johnson.
Webster 1828 Edition
Labefaction
LABEFAC'TION
,Noun.
  A weakening or loosening; a failing; decay; downfall; ruin.
Definition 2025
labefaction
labefaction
English
Noun
labefaction (uncountable)
-  (rare) The act of shaking or weakening or the resulting state; overthrow, ruination.
-  1963, C. N. Stavrou , "Religion in Byron's Don Juan," Studies in English Literature, 1500-1900, vol. 3, no. 4, p. 590,
- Man's labefaction did not occur in time past; nor does it wait upon time future.
 
 -  1968, "The Casualty Loss Deduction and Consumer Expectation: Section 165(c)(3) of the Internal Revenue Code," The University of Chicago Law Review, vol. 36, no. 1, p. 224 (citing 54 F.2d 537 (2d Cir. 1931)),
- The court found "simply a steady labefaction from wind and weather more rapid than usual because of structural defects."
 
 
 -  1963, C. N. Stavrou , "Religion in Byron's Don Juan," Studies in English Literature, 1500-1900, vol. 3, no. 4, p. 590,
 
Related terms
Translations
act of shaking orweakening or the resulting state; overthrow, ruination
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References
- “labefaction” in An American Dictionary of the English Language, by Noah Webster, 1828.
 - labefaction in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
 - “labefaction” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
 - Oxford English Dictionary, 2nd ed., 1989.