Found 2 items, similar to sea level.
English → English (WordNet) Definition: sea level sea level n : 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
English → English (gcide) Definition: Sea level Sea level \Sea“ lev”el\ The level of the surface of the sea; any surface on the same level with the sea. [1913 Webster]