seamount

noun

sea·​mount ˈsē-ˌmau̇nt How to pronounce seamount (audio)
Synonyms of seamountnext
: a submarine mountain rising above the deep-sea floor

Examples of seamount in a Sentence

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
These cobalt crusts are found on seamount slopes, which contain vital metals such as cobalt, nickel, and platinum. — Mrigakshi Dixit, Interesting Engineering, 7 Nov. 2025 The issue was further complicated by the fact that less than one-tenth of one percent of the world’s seamounts has been explored with any significant detail, even as they are found in every world ocean basin. — Peter Suciu, Forbes.com, 2 June 2026 Over millions of years, metals in the surrounding seawater form coatings of iron and manganese oxides, with thicknesses ranging from a few millimeters to a few decimeters, depending on the age of the seamounts. — Leonardo MacElloni, The Conversation, 10 Mar. 2026 The seamount is 250 miles north of Palau — an island country east of the Philippines — and multibeam sonar revealed its peak is hidden about 800 feet below the surface. — Mark Price, Sacbee.com, 11 Sep. 2025 See All Example Sentences for seamount

Word History

First Known Use

1941, in the meaning defined above

Time Traveler
The first known use of seamount was in 1941

Rhymes for seamount

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Browse Nearby Words

sea moth
seamount
sea mouse
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Cite this Entry

“Seamount.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seamount. Accessed 8 Jul. 2026.

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Kids Definition

seamount

noun
sea·​mount ˈsē-ˌmau̇nt How to pronounce seamount (audio)
: a submarine mountain

More from Merriam-Webster on seamount

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