- an mass of thick ice, esp. in a highland area, which may feed valley glaciers about its borders
- an extensive area of floating sea ice, specif. an area more than 8 km (5 mi) across
- 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 kilometers (6 miles) across.
(plural ice fields)