from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Capable of reasoning; rational.
  • adjective Governed by or being in accordance with reason or sound thinking.
  • adjective Being within the bounds of common sense.
  • adjective Not excessive or extreme; fair.

from The Century Dictionary.

  • Having the faculty of reason; endowed with reason; rational, as opposed to brute.
  • Characterized by the use of reason; amenable to reason or sound sense; not senseless, foolish, or extravagant in thought or action.
  • Conformable to or required by reason; due to or resulting from good judgment; rationally sound, sensible, natural, etc.
  • Not exceeding the bounds of reason or common sense; moderate; tolerable.
  • Moderate in amount or price; not high or dear: as, reasonable charges or prices; reasonable goods.
  • In law, befitting a person of reason or sound sense; such as a prudent man would exercise or act upon in his own affairs: as, reasonable care; reasonable diligence; reasonable cause.
  • Calculable; computable; hence, detailed; itemized.
  • Talkative; ready in conversation.
  • Synonyms Rational, Reasonable. See rational.
  • Reasonably.

from the GNU version of the Collaborative International Dictionary of English.

  • adverb obsolete Reasonably; tolerably.
  • adjective Having the faculty of reason; endued with reason; rational.
  • adjective Governed by reason; being under the influence of reason; thinking, speaking or acting rationally, or according to the dictates of reason; agreeable to reason; just; rational.
  • adjective Not excessive or immoderate; within due limits; proper.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Just; fair; agreeable to reason.
  • adjective Not expensive; fairly priced.
  • adjective Satisfactory.

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

  • adjective marked by sound judgment
  • adjective showing reason or sound judgment
  • adjective not excessive or extreme


from Wiktionary, Creative Commons Attribution/Share-Alike License

Old French resnable, from Late Latin rationabilis, more at reason, -able.


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