a large flat mass of ice (larger than an ice floe) floating at sea
A large, level area of ice, either of sea ice (more than five miles across) or an ice cap or highland ice.
A continuous accumulation of snow and glacier ice that completely fills a mountain basin or covers a low-relief mountain plateau to a substantial depth. When the thickness become great enough, tongues of ice overflow the basins or plateaus as Valley Glaciers.
An ice field is specifically a large continuous area of pack ice or sea ice, more than 8km across.
A sheet of glacier ice that collects in a mountain range or between adjoining ranges.
An ice field (also spelled icefield) is an area less than 50,000 km² (19,305 mile²) of ice often found in the colder climates and higher altitudes of the world where there is sufficient precipitationhttp://gemini.oscs.montana.edu/~geol445/hyperglac/glossary.htm. It is an extensive area of interconnected valley glaciers from which the higher peaks rise as nunataks. Ice fields are larger than alpine glaciers, smaller than ice sheets and similar in area to ice caps.