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hierarchy

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noun
  • system with grades of authority or status from the lowest to the highest [Barron]
  • the classification of a group of people according to ability or to economic, social, or professional standing [Taisha]

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Wiktionary:
hierarchy @ wiktionary
WordNet:
hierarchy @ wordnet.princeton.edu
Merriam-Webster Online:
hierarchy @ M-W.com
MSN Encarta:
hierarchy @ Encarta
American Heritage Dictionary of the English Language:
hierarchy @ AHD provided by Yahoo! Education
Answers.com:
hierarchy @ Answers.com
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