Reasonable — Meaning, Definition & Synonyms

Reasonable (adjective) — Senses, Synonyms & Antonyms

1. according to the rules of logic

   "his answer is perfectly reasonable"

   similar: analytic, coherent, consequent, good, logical, rational, sensible, sound, valid, well-founded, well-grounded
   related: a posteriori, a priori, syllogistic, cognitive, empirical, defendable, defensible, justifiable, maintainable, supportable, sustainable, tenable
   opposite: illegitimate, illogical, incoherent, inconsequent, inconsequential, invalid, irrational, unreasonable, unsound, weak
   near: casuistic, eristic, fallacious, misleading, sophistic, specious, unarticulated, unscientific, absurd, cockeyed, crazy, daffy, fatuous, half-baked, half-witted, harebrained, insane, loony, mad, nonsensical, nutty, preposterous, simpleminded, stupid, weak-minded, witless, senseless, thoughtless, uncompelling, unconvincing

2. based on sound reasoning or information

   "those playing rules sound reasonable to me"

   similar: commonsense, commonsensible, commonsensical, firm, good, hard, informed, just, justified, levelheaded, logical, rational, reasoned, sensible, sober, solid, valid, well-founded
   related: actual, real, true, certain, sure, certified, validated, verified, confirmed, corroborated, substantiated, cogent, convincing, colorable, credible, plausible
   opposite: groundless, illogical, invalid, irrational, nonrational, nonsensical, nonvalid, unfounded, uninformed, unjustified, unreasonable, unreasoned, unsound
   near: unsubstantiated, unsupported, unwarranted, flimsy, implausible, unconvincing, weak, fallacious, false, misguided, misled

3. costing little

   "desperately trying to find reasonable hotel rates for the holiday weekend"

   similar: affordable, bargain-basement, budget, cheap, cheapie, cheapo, chintzy, cut-price (chiefly British), cut-rate, dime-store, dirt cheap, el cheapo, inexpensive, low, low-end, popular
   related: cheapish, moderate, discount, discounted, fire-sale, lowered, reduced, wholesale, valueless, worthless, supercheap, ultracheap
   opposite: costly, dear, deluxe, expensive, high, high-ticket, precious, premium, pricey, spendy (chiefly Northwest), valuable
   near: increased, inflated, exorbitant, extravagant, overpriced, prohibitive, prohibitory, steep, stiff, superexpensive, ultraexpensive, unreasonable, invaluable, priceless, luxurious

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"

   similar: intelligent, rational, reasoning, thinking
   related: analytic, logical, brainy, cerebral, highbrow, highbrowed, intellectual, cognitional, cognitive, mental, levelheaded, practical, sane, sensible, sober
   opposite: irrational, nonrational, nonthinking, unintelligent, unreasonable, unreasoning, unthinking
   near: brainless, dense, doltish, dopey, dorky (slang), dull, dumb, fatuous, half-witted, mindless, obtuse, senseless, slow, stupid, thickheaded, fallacious, groundless, illogical, invalid, nonsensical