Main entry: intelligent
Definition: having the capacity for thought and reason especially to a high degree
Usage: is there intelligent life in the universe?; an intelligent question
Antonyms: stupid, unintelligent
Definition: lacking intelligence
Antonyms: unnatural
Definition: not in accordance with or determined by nature; contrary to nature
Antonyms: unreal, artificial
Definition: contrived by art rather than nature
Antonyms: supernatural
Definition: not existing in nature or subject to explanation according to natural laws; not physical or material
Antonyms: flat
Definition: (of a musical note) lowered in pitch by one chromatic semitone
Antonyms: sharp
Definition: (of a musical note) raised in pitch by one chromatic semitone
Antonyms: unready
Definition: not prepared or in a state of readiness; slow to understand or respond
Antonyms: stupid
Definition: lacking or marked by lack of intellectual acuity
Antonyms: nonprehensile
Definition: not prehensile
Antonyms: dull
Definition: emitting or reflecting very little light
Antonyms: unborn
Definition: not yet brought into existence
Main entry: intelligent, reasoning, thinking
Definition: endowed with the capacity to reason
Antonyms: irrational
Definition: not consistent with or using reason
Antonyms: irrational
Definition: real but not expressible as the quotient of two integers
Main entry: healthy, intelligent, sound, level-headed, levelheaded
Definition: exercising or showing good judgment
Usage: healthy scepticism; a healthy fear of rattlesnakes; the healthy attitude of French laws; healthy relations between labor and management; an intelligent solution; a sound approach to the problem; sound advice; no sound explanation for his decision
Antonyms: insensible
Definition: incapable of physical sensation
Antonyms: unreasonable
Definition: not reasonable; not showing good judgment
Main entry: well-informed, intelligent
Definition: possessing sound knowledge
Usage: well-informed readers
Definition: marked by or showing unaffected simplicity and lack of guile or worldly experience