Nep·​tune ˈnep-ˌtün How to pronounce Neptune (audio)
: the Roman god of the sea compare poseidon
: ocean
: the planet eighth in order from the sun see Planets Table
Neptunian adjective

Examples of Neptune in a Sentence

sailors shipwrecked by the wild waves of Neptune
Recent Examples on the Web The Moon begins the day in deep-thinking Scorpio with a trine to mystical Neptune, opening our minds, while a lunar sextile to Pluto will encourage us to plumb our own depths. Tarot Astrologers, Chicago Tribune, 20 Sep. 2023 Some companies may hike up premiums, while others may refuse to issue new policies to riskier homes, according to Trevor Burgess, CEO of the private flood insurance company Neptune Insurance. Sarah Raza,, 18 Sep. 2023 This particular new moon aspects both Uranus retrograde and Neptune retrograde, and the planetary ruler of the new moon in Virgo is Mercury, which is also retrograde. Elizabeth Gulino,, 15 Sep. 2023 Holst leaves the listener in the far removes of outer space, with Neptune being a study in musical mysticism, highlighted by a hidden hymning women’s chorus, as if heard from a mysterious distance. Mark Swed, Los Angeles Times, 15 Sep. 2023 Read full article The gunfire happened around 11:30 a.m. near the intersection of Commercial and Neptune streets, State Police spokesman David Procopio said. Talia Lissauer,, 13 Sep. 2023 Scientists detected the presence of methane and carbon dioxide within the exoplanet’s atmosphere, supporting the idea that the orb—which is between the size of Earth and Neptune—may host a watery ocean beneath an atmosphere rich with hydrogen. Will Sullivan, Smithsonian Magazine, 12 Sep. 2023 Evidence of water vapor has previously been found on an exoplanet roughly the size of Neptune about 120 light-years away. Ellen Francis, Washington Post, 12 Sep. 2023 The home where deputies discovered the twin girls is about 10 miles east of downtown Jacksonville and west of Neptune Beach. Scott Butler, USA TODAY, 9 Sep. 2023 See More

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Word History


Latin Neptunus

First Known Use

before the 12th century, in the meaning defined at sense 1a

Time Traveler
The first known use of Neptune was before the 12th century

Dictionary Entries Near Neptune

Cite this Entry

“Neptune.” Dictionary, Merriam-Webster, Accessed 1 Oct. 2023.

Kids Definition


Nep·​tune ˈnep-ˌt(y)ün How to pronounce Neptune (audio)
: the planet eighth in order from the sun see planet
Neptunian adjective

More from Merriam-Webster on Neptune

Last Updated: - Updated example sentences
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