Poseidon

noun

Po·​sei·​don pə-ˈsī-dᵊn How to pronounce Poseidon (audio)
: the Greek god of the sea compare neptune

Examples of Poseidon in a Sentence

Recent Examples on the Web
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Since August 22, three Boeing P-8 Poseidon aircraft used for signals intelligence gathering crossed the Atlantic into the Caribbean theater. Natasha Bertrand, CNN Money, 19 Oct. 2025 Did Grace and Hal plot to steal the Poseidon? Randall Colburn, Entertainment Weekly, 17 Oct. 2025 Grace Penn can then show them to Trowbridge and prove that the Poseidon exists. Trish Deitch, Variety, 17 Oct. 2025 Kate's secret lover — tells her that the Russians found the sub and took the Poseidon. Christopher Rudolph, PEOPLE, 17 Oct. 2025 See All Example Sentences for Poseidon

Word History

Etymology

Latin, from Greek Poseidōn

First Known Use

1811, in the meaning defined above

Time Traveler
The first known use of Poseidon was in 1811

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Cite this Entry

“Poseidon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Poseidon. Accessed 31 Oct. 2025.

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