reasonable

1 according to the rules of logic his answer is perfectly reasonable Synonyms analytic (or analytical), coherent, consequent, good, rational, logical, sensible, sound, valid, well-founded, well-groundedRelated Words a posteriori, a priori, syllogistic; cognitive, empirical (also empiric); defendable, defensible, justifiable, maintainable, supportable, sustainable, tenableNear Antonyms casuistic (or casuistical), eristic (also eristical), fallacious, misleading, sophistic (or sophistical), specious; unarticulated; unscientific; absurd, cockeyed, crazy, daffy, fatuous, half-baked, half-witted, harebrained, insane, loony (also looney), mad, nonsensical, nutty, preposterous, simpleminded, stupid, weak-minded, witless; senseless, thoughtless; uncompelling, unconvincingAntonyms illegitimate, illogical, incoherent, inconsequent, inconsequential, invalid, irrational, unreasonable, unsound, weak

2 based on sound reasoning or information those playing rules sound reasonable to me Synonyms commonsense, commonsensible, commonsensical, firm, hard, informed, just, justified, levelheaded, logical, rational, good, reasoned, sensible, sober, solid, valid, well-foundedRelated Words actual, real, true; certain, sure; certified, validated, verified; confirmed, corroborated, substantiated; cogent, convincing; colorable, credible, plausibleNear Antonyms unsubstantiated, unsupported, unwarranted; flimsy, implausible, unconvincing, weak; fallacious, false, misguided, misledAntonyms groundless, illogical, invalid, irrational, nonrational, nonsensical, nonvalid, unfounded, uninformed, unjustified, unreasonable, unreasoned, unsound

3 costing little desperately trying to find reasonable hotel rates for the holiday weekend Synonyms affordable, bargain-basement, budget, cheapie, cheapo, chintzy, cut-price [chiefly British], cut-rate, dime-store, dirt cheap, el cheapo, inexpensive, low, low-end, popular, cheapRelated Words cheapish, moderate; discount, discounted, fire-sale, lowered, reduced; wholesale; valueless, worthless; supercheap, ultracheapNear Antonyms increased, inflated; exorbitant, extravagant, overpriced, prohibitive, prohibitory, steep, stiff, superexpensive, ultraexpensive, unreasonable; invaluable, priceless; luxuriousAntonyms costly, dear, deluxe, expensive, high, high-ticket, precious, premium, pricey (also pricy), spendy [chiefly Northwest], valuable

4 having the ability to reason some people once believed that women were not by nature reasonable beings, but generations of female scholars have proved those people wrong Synonyms intelligent, rational, reasoning, thinkingRelated Words analytic (or analytical), logical; brainy, cerebral, highbrow, highbrowed, intellectual; cognitional, cognitive, mental; levelheaded, practical, sane, sensible, soberNear Antonyms brainless, dense, doltish, dopey (also dopy), dorky [slang], dull, dumb, fatuous, half-witted, mindless, obtuse, senseless, slow, stupid, thickheaded; fallacious, groundless, illogical, invalid, nonsensicalAntonyms irrational, nonrational, nonthinking, unintelligent, unreasonable, unreasoning, unthinking