adjective
not logical or sensible
Synonyms: absurd, all wet, arbitrary, biased, capricious, contradictory, erratic, fallacious, far-fetched, foolish, full of hot air, headstrong, illogical, incoherent, incongruous, inconsequential, inconsistent, invalid, irrational, loose, mad, nonsensical, off the wall, opinionated, preposterous, quirky, reasonless, senseless, silly, stupid, thoughtless, unreasoned, vacant, wrong
Antonyms: logical, practical, pragmatic, realistic, reasonable, sensible
adjective
extravagant; beyond normal limits
Synonyms: absonant, arbitrary, costing an arm and a leg, dear, excessive, exorbitant, extortionate, extreme, far-out, illegitimate, immoderate, improper, inordinate, intemperate, out of bounds, overkill, overmuch, peremptory, posh, pricey, senseless, steep, stiff, too great, too much, too-too, uncalled-for, unconscionable, undue, unfair, unjust, unjustifiable, unlawful, unrightful, unwarrantable, unwarranted, up to here, way out, wrongful
Antonyms: cheap, economical, low, plain, reasonable