Sea level is the average level of the sea with respect to the land. The height of mountains or other areas is calculated in relation to sea level.
The stadium was 2275 metres above sea level.
The whole place is at sea level.
The melting ice caused a rise in sea level.
sea level in British English
noun
the level of the surface of the sea with respect to the land, taken to be the mean level between high and low tide, and used as a standard base for measuring heights and depths
sea level in American English
the level of the surface of the sea, esp. the mean level between high and low tide:used as a standard in measuring heights and depths
Examples of 'sea level' in a sentence
sea level
`The mountain itself is nine hundred and seventeen feet above sea level.