Poseidon

American  

[poh-sahyd-n, puh-] / poʊˈsaɪd n, pə- /

noun

1. the ancient Greek god of the sea, with the power to cause earthquakes, identified by the Romans with Neptune.

2. Military. a 34-foot (10-meter), submarine-launched U.S. ballistic missile with up to 10 warheads and a range of 2,800 miles (4,502 km).

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Poseidon British  

/ pɒˈsaɪdən /

noun

1. Roman counterpart: Neptune. Greek myth the god of the sea and of earthquakes; brother of Zeus, Hades, and Hera. He is generally depicted in art wielding a trident

2. a US submarine-launched ballistic missile

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Poseidon Cultural  

1. The Greek name for Neptune, the god in classical mythology who ruled the sea.

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Example Sentences

See Examples For:

Poseidon

But in another alteration, Damon’s Odysseus fires an arrow into the already blinded Cyclops’ eye as he escapes, giving the monster’s father, Poseidon, a new reason to make his journey home miserable.

From Los Angeles Times ● Jul. 21, 2026

Instead of Gods like Poseidon and Zeus playing an integral role in the story, they are left as unseen forces that motivate the characters’ actions.

From Salon ● Jul. 18, 2026

On 15 May, two US MQ-4C Triton surveillance drones also operated off the coast of southern Cuba, with tracking showing them operating along a route similar to one previously flown by a Poseidon.

From BBC ● May 20, 2026

Yangzijiang plans to acquire a 10% interest in Poseidon, the holding company of Seaspan, one of the world’s largest containership lessors, the analyst notes.

From The Wall Street Journal ● Apr. 8, 2026

The seat of Poseidon stood just to the right of Zeus’s, but it wasn’t nearly as grand.

From "The Last Olympian" by Rick Riordan