high fantasy

Short definition from Wiktionary

Noun

1. 1
   A subgenre of fantasy fiction set in a secondary world or fantasy world as opposed to the primary world or real world.
2. 2
   A subgenre of fantasy fiction that focuses on universal events, instead of just those directly associated with the main characters.
3. 3
   A work in this subgenre.

Adjective

1. 1
   Having a rich fantasy life; including having imaginary companions and playing pretend games.