- a large sheet of floating ice, larger than an ice floe.
- a very large flat expanse of ice floating in the sea; large ice floe
- a large mass of ice permanently covering an extensive area of land
- A large expanse of ice covering a mountainous region and consisting of several interconnected glaciers.
- 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 km (6.2 mi) across.