mean sea level

noun

The mean altitude of the ocean surface, averaged over all high and low tides at a particular location.

Similar
MSL
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Meanings

nounmean sea level (countable and uncountable, plural mean sea levels)

plural mean sea levels

  1. countableuncountableaeronauticsThe mean altitude of the ocean surface, averaged over all high and low tides at a particular location.

    Synonyms: MSL

Synonyms & antonyms

nounThe mean altitude of the ocean surface, averaged over all high and low tides at a particular location.

Similar
MSL
Also see
sea level
Cite this entry
APA

mean sea level. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/mean%20sea%20level

MLA

“mean sea level.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/mean%20sea%20level. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “mean sea level,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/mean%20sea%20level.

Source: mean sea level on Wiktionary, CC BY-SA 4.0.