adjective
agreeable to reason
offered a rational explanation
Synonyms: consequent, intelligent, logical, reasonable, sensible, sound
Related Word: calm, cool, level-headed, sober, stable; circumspect, judicious, prudent; lucid, normal, sane
Contrasted words: rash, reckless, wild; groundless, illogical, unreasonable, unreasoning, unsound; crazy, demented, deranged
Antonyms: animal, irrational; absurd