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

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

The angry sea god Poseidon is reduced to rumors; mighty Zeus withheld to a few well-timed thunderclaps.

From Los Angeles Times ● Jul. 15, 2026

The U.S. sent a P-8A Poseidon spy plane but elected not to send a destroyer as it had in the past.

From The Wall Street Journal ● Mar. 10, 2026

The U.S. brought in P-8 Poseidon “sub-hunter” aircraft and AC-130J gunships to help with the boarding operation of the ship south of Iceland, according to flight-tracking data and two U.S. officials.

From The Wall Street Journal ● Jan. 7, 2026

Poseidon had a splendid palace beneath the sea, but he was oftener to be found in Olympus.

From "Mythology: Timeless Tales of Gods and Heroes" by Edith Hamilton