intelligent
adjective(in-tel-li-gent)
possessing sound knowledge
Synonyms: well-informed, 
intelligent
adjective(in-tel-li-gent)
endowed with the capacity to reason
intelligent
adjective(in-tel-li-gent)
exercising or showing good judgment
Examples:
An intelligent solution. 
intelligent
adjective(in-tel-li-gent)
having the capacity for thought and reason especially to a high degree
Examples:
Is there intelligent life in the universe?. 
An intelligent question.