from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To reason methodically and logically.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To use the powers of the mind logically and methodically; to reason.

from the GNU version of the Collaborative International Dictionary of English

  • intransitive v. To reason, esp. deductively; to offer reason or argument.

from The Century Dictionary and Cyclopedia

  • To reason; from two judgments to infer a third. The word usually implies an elaborate deductive operation.
  • Reasoned about.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. reason methodologically and logically


Latin ratiōcinārī, ratiōcināt-, from ratiō, calculation; see ratio.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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