Meaning of the word "ice sheet" in English

What does "ice sheet" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

ice sheet

US /ˈaɪs ˌʃiːt/
UK /ˈaɪs ˌʃiːt/

Noun

a permanent layer of ice covering an extensive area of land, especially in polar regions

Example:
The melting of the Greenland ice sheet is a major concern for climate scientists.
Antarctica is covered by a massive ice sheet.