Sentence:  <WSD>HIGH FANTASY</WSD>. A term used by Lloyd Alexander in a 1971 essay on “<WSD>High Fantasy</WSD> and Heroic Romance" and subsequently developed by Kenneth J. Zahorski and Robert H. Boyer in an attempt to develop a terminology with which to deal with genre materials. In Zahorski and Boyer's taxonomy, <WSD>high fantasy</WSD> consists entirely of fiction set in second worlds, while the low fantasy with which it is immediately contrasted consists of fiction set in the primary world, into which magical objects and entities are introduced piecemeal (ie. intrusive fantasy). 
Meaning of the word marked with <WSD> tags:  A subgenre of fantasy fiction set in a secondary world or fantasy world as opposed to the primary world or real world.