Adjective

(en-adj)

Of high or especially quick cognitive capacity, bright.

*{{quote-book, year=1927, author= F. E. Penny

, chapter=5, title= Pulling the Strings , passage=Anstruther laughed good-naturedly. “[…] I shall take out half a dozen intelligent maistries from our Press and get them to give our villagers instruction when they begin work and when they are in the fields.”}}

Well thought-out, well considered.

Characterized by thoughtful interaction.

Having the same level of brain power as mankind.

Having an environment-sensing automatically-invoked built-in computer capability.

Adjective

(en adjective)

Having the faculty of reason; endued with reason; rational.

a reasonable being

Just; fair; agreeable to reason.

* {{quote-news

, year=2012 , date=May 27 , author=Nathan Rabin , title=TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992) , work=The Onion AV Club citation , page= , passage=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, throw out his impressive collection of rotting Jack-O-Lanterns from previous Halloweens and take out his garbage, as it’s attracting wildlife (cue moose and Northern Exposure theme song).}}

Not excessive or immoderate; within due limits; proper.

a reasonable demand, amount, or price

Not expensive; fairly priced.

$20 a bottle is very reasonable for a good wine at a restaurant.

Satisfactory.