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third-person singular simple present ameliorates, present participle ameliorating, simple past and past participle ameliorated
(transitive) To make better, or improve, something perceived to be in a negative condition. quotations examples
In every human being there is a wish to ameliorate his own condition.
1849–1861, Thomas Babington Macaulay, chapter 3, in The History of England from the Accession of James the Second, volumes (please specify |volume=I to V), London: Longman, Brown, Green, and Longmans
(intransitive) To become better; improve. examples