1. (

• intelligent

) having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question" ;

2. (

• intelligent ,
• well-informed

) possessing sound knowledge; "well-informed readers" ;

3. (

• healthy ,
• intelligent ,
• levelheaded ,
• level-headed ,
• sound

) exercising or showing good judgment; "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" ;

4. (

• intelligent ,
• reasoning ,
• thinking

) endowed with the capacity to reason ;