A continent round the South Pole, situated mainly within the Antarctic Circle and almost entirely covered by ice sheets. Its exploitation is governed by an international treaty of 1959, which was renewed in 1991.
Definition of Antarctica in US English:
Antarctica
proper noun
A continent around the South Pole, situated mainly within the Antarctic Circle and almost entirely covered by ice sheets. Its exploitation is governed by an international treaty of 1959, which was renewed in 1991.