visionary

Short definition from Wiktionary

Adjective

1. 1
   Having vision or foresight.
2. 2
   Imaginary or illusory.
3. 3
   Prophetic or revelatory.
4. 4
   Idealistic or utopian.

Noun

1. 1
   Someone who has visions; a seer.
2. 2
   An impractical dreamer.
3. 3
   Someone who has creative and positive ideas about the future.