Definitions for Poseidonpoʊˈsaɪd n, pə-
Random House Webster's College Dictionary
Po•sei•donpoʊˈsaɪd n, pə-(n.)
the ancient Greek god of the sea and of horses: identified by the Romans with Neptune.
(Greek mythology) the god of the sea and earthquakes in ancient mythology; brother of Zeus and Hades and Hera; identified with Roman Neptune
The god of the sea and other waters, earthquakes and horses.
Origin: From Ποσειδῶν.
The Nuttall Encyclopedia
in the Greek mythology the god of the sea, a son of Kronos and Rhea, and brother of Zeus, Pluto, Hera, Hestia, and Demeter; had his home in the sea depths, on the surface of which he appeared with a long beard, seated in a chariot drawn by brazen-hoofed horses with golden manes, and wielding a trident, which was the symbol of his power, exercised in production of earthquake and storms. See Pluto.