sea level

noun

: the level of the surface of the sea especially at its mean position midway between mean high and low water compare ground level sense 1a

Examples of sea level in a Sentence

Recent Examples on the Web
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El Niño also causes trade winds to weaken across the tropical Pacific Ocean, setting off a chain of events that ultimately warm the ocean and raise sea levels around the Americas, typically for at least several months, according to NOAA. Emily Mae Czachor, CBS News, 18 May 2026 With a top altitude of 1,100 feet, this position at the highest point in the AVA offers warmer nighttime temperatures than the valley floor thanks to the warm air rising and cool air sinking, while daytime temperatures are lower than in areas closer to sea level. Mike Desimone, Robb Report, 17 May 2026 The nightscapes are equally mind-bending here in this high-altitude park, which ranges from around 8,000 to over 9,000 feet above sea level. Stephanie Vermillion, Travel + Leisure, 17 May 2026 Rising 3,885 feet above sea level, Kuuchamaa has also captivated non-Native people. Julie Watson, Los Angeles Times, 17 May 2026 See All Example Sentences for sea level

Word History

First Known Use

1806, in the meaning defined above

Time Traveler
The first known use of sea level was in 1806

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Cite this Entry

“Sea level.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20level. Accessed 21 May. 2026.

Kids Definition

sea level

noun
: the height of the surface of the sea midway between the average high and low tides

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