1. Having the capacity for thought and reason especially to a high degree
   "is there intelligent life in the universe?"; "an intelligent question" 
2. Possessing sound knowledge
   - well-informed, savvy 
3. Exercising or showing good judgment
   "an intelligent solution"
   - healthy, levelheaded, level-headed, sound 
4. Endowed with the capacity to reason
   - reasoning, thinking

See also: agile, apt, born, brainy, bright, brilliant, clever, innate, intelligence, intelligently, natural, nimble, precocious, prehensile, quick, rational, ready, reasonable, scintillating, searching, sensible, smart, smart as a whip, sophisticated, trenchant

Antonym: unintelligent

Encyclopedia: Intelligent

• extraterrestrial object
• extraterritorial
• extraterritoriality
• extrauterine gestation
• extrauterine pregnancy
• extravagance
• extravagancy
• extravagant
• extravagantly
• extravaganza
• extravasate
• extravasation
• extravascular
• extravehicular
• extraversion
• extraversive
• extravert
• extraverted
• extravertive
• extreme
• extreme point
• extreme right-winger
• extreme unction
• extremely
• extremely high frequency