middle-earth

Short definition from Wiktionary

Noun

1. 1
   Alternative form of Middle Earth: (archaic) the Earth; (Norse mythology) Midgard.
2. 2
   Alternative letter-case form of Middle-earth: the setting of the Lord of the Rings mythos.

Proper noun

1. 1
   Alternative letter-case form of Middle Earth.
2. 2
   The Earth.
3. 3
   synonym for Midgard, the world of traditional Germanic cosmology, conceived as a realm between heaven (Asgard) and hell (Niflheim).
4. 4
   Alternative form of Middle-earth: the setting of the Lord of the Rings series.
5. 5
   Alternative spelling of Middle Earth.
6. 6
   Alternative letter-case form of Middle-earth.
7. 7
   The main setting of J. R. R. Tolkien's Lord of the Rings and other works.
8. 8
   Alternative form of Middle Earth: the Earth.