Neptune

noun

Nep·​tune ˈnep-ˌtün How to pronounce Neptune (audio)
-ˌtyün
1
a
: the Roman god of the sea compare poseidon
b
: ocean
2
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Daily stress can have you on the edge of collapse as the moon triggers Saturn and Neptune. Usa Today, USA Today, 18 Aug. 2025 Uranus and Neptune will also be in the sky, though both require a telescope to see easily. Jamie Carter, Forbes.com, 18 Aug. 2025 Mercury, Venus, Jupiter, Saturn, Uranus and Neptune are all making their appearance in the eastern sky just before sunrise, offering a unique opportunity to witness this celestial phenomenon. Maria Azzurra Volpe, MSNBC Newsweek, 15 Aug. 2025 From Jupiter’s swirling storms to Neptune’s icy depths, planets across our solar system are orbited by a fascinating cast of moons. Kenna Hughes-Castleberry, Space.com, 15 Aug. 2025 See All Example Sentences for Neptune

Word History

Etymology

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

Browse Nearby Words

Cite this Entry

“Neptune.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Neptune. Accessed 21 Aug. 2025.

Kids Definition

Neptune

noun
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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