Added 9 October 2026 antarctica noun Categories: NatureRare Words noun ! Definition from WordNet 3.1, Princeton University. More about antarctica at Wordnik → Where our words come from → An extremely cold continent at the south pole almost entirely below the Antarctic Circle; covered by an ice cap up to 13,000 feet deep. Antarctica is twice the size of Australia Related Words: antarcticsouthernaustraliacontinentantartica Back to today's word