neptune   (Sound)

The noun neptune has 2 senses

• Neptune -- ((Roman mythology) god of the sea; counterpart of Greek Poseidon)


• Neptune -- (a giant planet with a ring of ice particles; the 8th planet from the sun is the most remote of the gas giants; "the existence of Neptune was predicted from perturbations in the orbit of Uranus and it was then identified in 1846")