Nep·tune
| \ ˈnep-ˌtün
, -ˌtyün \
, -ˌtyün \
Definition of Neptune
2
: the planet eighth in order from the sun — see Planets Table
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Other Words from Neptune
Neptunian
\
nep-ˈtü-nē-ən
, -ˈtyü-
\
adjective
, -ˈtyü-
\
adjective
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Cite this Entry
“Neptune.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Neptune. Accessed 14 May. 2021.
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More Definitions for Neptune
Neptune
noun
English Language Learners Definition of Neptune
: the planet that is eighth in order from the sun
See the full definition for Neptune in the English Language Learners Dictionary
Neptune
noun
Nep·tune
| \ ˈnep-ˌtün
, -ˌtyün \
, -ˌtyün \
Kids Definition of Neptune
: the planet that is eighth in order of distance from the sun and has a diameter of about 31,000 miles (50,000 kilometers)
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Time Traveler for Neptune
The first known use of Neptune was before the 12th century
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