WordWeb Online

1. Capable of physically reflecting light or sound
   "a reflective surface"
    
2. Deeply or seriously thoughtful
   "Byron lives on not only in his poetry, but also in his creation of the 'Byronic hero' - the persona of a reflective melancholy young man";
   - brooding, broody, contemplative, meditative, musing, pensive, pondering, ruminative
    
3. Devoted to matters of the mind
   "the reflective type"

See also: intellectual, mirrorlike, reflecting, specular, thoughtful

Antonym: nonreflective

Encyclopedia: Reflective