say it: mit-i-GAY-shuhn
mitigation is a noun meaning "to act in such a way as to cause an offense to seem less serious". It carries 3 recorded senses.
to act in such a way as to cause an offense to seem less serious
a partial excuse to mitigate censure; an attempt to represent an offense as less serious than it appears by showing mitigating circumstances
the action of lessening in severity or intensity
“the object being control or moderation of economic depressions”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mitigation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.