Definitions

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

  • n. Use of reason, especially to form conclusions, inferences, or judgments.
  • n. Evidence or arguments used in thinking or argumentation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Action of the verb to reason.
  • n. The deduction of inferences or interpretations from premises; abstract thought; ratiocination.
  • v. Present participle of reason.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act or process of adducing a reason or reasons; manner of presenting one's reasons.
  • n. That which is offered in argument; proofs or reasons when arranged and developed; course of argument.

from The Century Dictionary and Cyclopedia

  • n. The use of the faculty of reason; discriminative thought or discussion in regard to a subject; rational consideration.
  • n. A presentation of reasons or arguments; an argumentative statement or expression; a formal discussion.
  • n. Discussion; conversation; discourse.
  • n. Synonyms Reasoning, Argumentation. Reasoning is much broader than argumentation. The latter is confined to one side of the question, or, in another sense, supposes a proposition, supported by arguments on the affirmative side and attacked by arguments on the negative. Reasoning may be upon one side of a proposition, and is then the same as argumentation; but it may also be the method by which one reaches a belief, and thus a way of putting together the results of investigation: as, the reasoning in Euclid, or in Butler's Analogy; the reasoning by which a thief justifies himself in stealing.

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

  • adj. endowed with the capacity to reason
  • n. thinking that is coherent and logical

Etymologies

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