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).

---

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

---

Poseidon Cultural  

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

---

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

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 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

If they were agreed Poseidon could not stand alone against them.

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