sea level

1. 1.

   level of the ocean's surface (especially that halfway between mean high and low tide); used as a standard in reckoning land elevation or sea depth

   Broaderwater level

Questions about sea level

What does sea level mean?

sea level means "level of the ocean's surface (especially that halfway between mean high and low tide); used as a standard in reckoning land elevation or sea depth".

Is sea level a common word?

sea level is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.