ˈsea ˌlevel BrE AmE noun [uncountable]
the average height of the sea, used as a standard for measuring other heights and depths, such as the height of a mountain
above/below sea level
1,000 m above sea level
changes in sea level
ˈsea ˌlevel BrE AmE noun [uncountable]
the average height of the sea, used as a standard for measuring other heights and depths, such as the height of a mountain
above/below sea level
1,000 m above sea level
changes in sea level
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012