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1. A large expanse of ice covering a mountainous region and consisting of several interconnected glaciers.
2. An extensive area of ice on the surface of the ocean, consisting of multiple ice floes and covering an area that is greater than 10 kilometers (6 miles) across.
1. (Physical Geography) a very large flat expanse of ice floating in the sea; large ice floe
2. (Physical Geography) a large mass of ice permanently covering an extensive area of land
a large sheet of floating ice, larger than an ice floe.