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
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.
Russian President Vladimir Putin has given state awards to the developers of the Burevestnik cruise missile and the Poseidon underwater torpedo, the latest signal in what analysts have cast as efforts by the Kremlin to discourage the West from supporting Ukraine. Christian Edwards, CNN Money, 4 Nov. 2025 The Poseidon, first glimpsed on Russian state television a decade ago, was developed to travel very large distances and trigger a city-destroying tsunami. Ellie Cook, MSNBC Newsweek, 4 Nov. 2025 Defense sources claim that the nuclear submarine can carry a large number of Poseidon torpedoes, which Russian President Vladimir Putin claims are ‘unstoppable’. Abhishek Bhardwaj, Interesting Engineering, 3 Nov. 2025 The Poseidon, first unveiled in 2018, is designed to travel across oceans at high speeds using nuclear propulsion and carry a massive warhead. Efrat Lachter , Anders Hagstrom, FOXNews.com, 29 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

Browse Nearby Words

Cite this Entry

“Poseidon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Poseidon. Accessed 5 Nov. 2025.

More from Merriam-Webster on Poseidon

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!