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Webster 1913 Edition

Adj.

Pertaining to the antipodes, or the opposite side of the world; antipodal.

antipodean ‎(not comparable)

diametrically opposed
relating to the antipodes, or situated at opposite sides of the Earth
(informal) of, or pertaining to, Australia or New Zealand
- 2000: Bill Bryson, In a Sunburned Country, pages 10-11:
  So there is a certain sense of achievement just in arriving in Australia—a pleasure and satisfaction to be able to step from the airport terminal into dazzling antipodean sunshine...

diametrically opposed

situated at opposite sides of the Earth

(informal) of, or pertaining to, Australia or New Zealand

antipodean ‎(plural antipodeans)

inhabitant of the antipodes