American Heritage Dictionary
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Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
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Elsewhere on the web
It is typical of the cures performed by healers, and on that account I shall give a rather full account of the phenomenon Touching by the sovereign for the amelioration of sundry diseases was a currently accepted therapeutic measure.— Three Thousand Years of Mental Healing
He said to himself, and said truly, that he loved the world, and that he would willingly spend himself in these great endeavours for the amelioration of its laws and the perfection of its judicial proceedings.— Orley Farm
Baffled in a consuming desire to solve the perplexing religious and social problems of the day by the force of his own intellect; longing for, yet despairing of, human progress; discerning the impracticability and chicanery of most of the modern plans for social amelioration--he determines to throw himself into common life, to bind himself to his race by stringent laws and duties.— The Continental Monthly, Vol. 6, No 3, September 1864 Devoted To Literature And National Policy
Two of the agents of legal amelioration, Fictions and Equity, were assiduously employed by the Roman lawyers to give the practical effects of a Mancipation to a Tradition: and, though Roman legislators long shrank from enacting that the right of property in a Res Mancipi should be immediately transferred by bare delivery of the article, yet even this step was at last ventured upon by Justinian, in whose jurisprudence the difference between Res Mancipi and Res Nec Mancipi disappears, and Tradition or Delivery becomes the one great conveyance known to the law.— Ancient Law Its Connection to the History of Early Society
The Indian Archipelago has fully shared this neglect; and even the tender philanthropy of the present day, which originates such multifarious schemes for the amelioration of doubtful evils, which shudders at the prolongation of apprenticeship for a single year in the West, is blind to the existence of slavery in its worst and most aggravated form in the East.— The Expedition to Borneo of H.M.S. Dido For the Suppression of Piracy

Century Dictionary (1)
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You can expect to see this word about once a month.