Permafrost
/ˈpɝməˌfɹɔst/ noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 Permanently frozen ground, or a specific layer thereof. countable, uncountable
"Nevertheless, the water molecule is present, as ice, in a solid form in frozen soils or permafrosts, which cover large regions characterised by a polar climate."
- 2 ground that is permanently frozen wordnet
Example
More examples"One fifth of the earth's surface is covered by permafrost."
Etymology
From perma- + frost.