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.
Most of the flights were by P-8A Poseidon maritime patrol aircraft, which are designed for surveillance and reconnaissance, while some were by an RC-135V Rivet Joint, which specializes in signals intelligence gathering. Avery Schmitz, CNN Money, 10 May 2026 The stage show The Eighth Voyage of Sinbad closed in 2018, while Poseidon's Fury, a major walk-through attraction with special effects, fire, and water stunts, shuttered in 2023. Christopher Edwards, PEOPLE, 7 May 2026 Royal Air Force personnel walk toward a Poseidon MRA1 maritime patrol aircraft at RAF Lossiemouth in northeast Scotland. Alan Crawford, Bloomberg, 20 Apr. 2026 The petite Thaleria Spa's magnesium pool proved unexpectedly restorative after a day trip to Balos Beach, while the main pool—an oval worthy of Poseidon's approval—is the property's social nucleus by day, stargazing sanctuary by night. Travel + Leisure Editors, Travel + Leisure, 15 Apr. 2026 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 11 May. 2026.

More from Merriam-Webster on Poseidon

Love words? Need even more definitions?

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

More from Merriam-Webster