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.
Villanova, which has won two national championships over the past decade, parted ways with coach Kyle Neptune after the season ended. Taylor Lyons, Baltimore Sun, 28 Mar. 2025 This could explain why Neptune’s auroras were concealed for so long. Abigail Adams, People.com, 27 Mar. 2025 This is because Neptune’s magnetic field has an odd orientation, which Voyager 2 revealed is tilted by 47 degrees relative to the planet’s axis of rotation. Margherita Bassi, Smithsonian Magazine, 27 Mar. 2025 With small nuclear fission reactors — and perhaps fusion power plants — Jupiter's moons Ganymede and Callisto, Saturn's moon Titan, Neptune's moon Triton and the whole Kuiper Belt may come into range. Dave S. Brody, Space.com, 26 Mar. 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 31 Mar. 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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