Definition of "lessening" []

• Present participle of lessen. (verb)
• A growing lesser; reduction or decrease. (noun)

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• "One major reason for satisfaction is that American medicine has been astoundingly successful in lessening mortality from the two most feared killers, cancer and heart disease."
• "The amendment arose from a long-standing interest in lessening human exposure to mercury, a known neurotoxin and nephrotoxin."
• "This has been an exercise in lessening BP's liability from day one."