Dictionary![]() ![]() mel•io•ra•tionPronunciation: (mēl"yu-rā'shun, mē"lē-u-), [key] —n. 1. Historical Ling.semantic change in a word to a more approved or more respectable meaning. Cf. pejoration (def. 2). 2. amelioration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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