Definition of "reasonable"

reasonable

/ˈɹiː.zən.ə.bəl/

adjective
comparative more reasonable, superlative most reasonable
1. (now rare) Having the faculty of reason; rational, reasoning.
  Quotations
  The wiſdome and underſtanding of this Beaſt [the beaver], vvill almoſt conclude him a reaſonable creature: […]
  1634, William Wood, “Beasts Living in the Water”, in New Englands Prospect. A True, Lively, and Experimentall Description of that Part of America, Commonly Called New England; […], London: […] Tho[mas] Cotes, for Iohn Bellamie, […], 1st part, page 25
2. Just; fair; agreeable to reason.
  Quotations
  The episode also opens with an inspired bit of business for Homer, who blithely refuses to acquiesce to an elderly neighbor’s utterly reasonable request that he help make the process of selling her house easier by wearing pants when he gallivants about in front of windows […]
  2012 May 27, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992)”, in The Onion AV Club‎
3. Not excessive or immoderate; within due limits; proper.
4. Not expensive; fairly priced.
5. Satisfactory.