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Thesaurus: authoritative


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authoritative

adjective
  1. Having or arising from authority: conclusive, official, sanctioned, standard. See true
  2. Worthy of belief, as because of precision or faithfulness to an original: authentic, convincing, credible, faithful, true, trustworthy, valid. See true
  3. Serving the function of deciding or settling with finality: conclusive, decisive, definitive, determinative, final. See decide
  4. Exercising authority: commanding, dominant, lordly, masterful. See over, strong

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Roget's II: The New Thesaurus, Third Edition by the Editors of The American Heritage® Dictionary.
Copyright © 1995 by Houghton Mifflin Company.
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