| Adj. | 1. | intelligent - having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question"smart - showing mental alertness and calculation and resourcefulness precocious - characterized by or characteristic of exceptionally early development or maturity (especially in mental aptitude); "a precocious child"; "a precocious achievement" unintelligent, stupid - without much intelligence; "a dull job with lazy and unintelligent co-workers" | |
| 2. | intelligent - possessing sound knowledge; "well-informed readers"sophisticated - having or appealing to those having worldly knowledge and refinement and savoir faire; "sophisticated young socialites"; "a sophisticated audience"; "a sophisticated lifestyle"; "a sophisticated book" | |
| 3. | intelligent - 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"reasonable, sensible - showing reason or sound judgment; "a sensible choice"; "a sensible person" | |
| 4. | intelligent - endowed with the capacity to reasonrational - consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought" | |