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We found 44 dictionaries with English definitions that include the word neptune:
Click on the first link on a line below to go directly to a page where "neptune" is defined.

General (28 matching dictionaries)

1. Neptune: Merriam-Webster.com [home, info]
2. Neptune: Oxford Dictionaries [home, info]
3. Neptune: American Heritage Dictionary of the English Language [home, info]
4. Neptune: Collins English Dictionary [home, info]
5. Neptune: Vocabulary.com [home, info]
6. Neptune, neptune: Wordnik [home, info]
7. Neptune, neptune: Cambridge Advanced Learner's Dictionary [home, info]
8. Neptune: Wiktionary [home, info]
9. Neptune: Webster's New World College Dictionary, 4th Ed. [home, info]
10. Neptune: The Wordsmyth English Dictionary-Thesaurus [home, info]
11. neptune: Infoplease Dictionary [home, info]
12. Neptune: Dictionary.com [home, info]
13. Neptune: Online Etymology Dictionary [home, info]
14. Neptune: UltraLingua English Dictionary [home, info]
15. neptune: Cambridge Dictionary of American English [home, info]
16. NEPTUNE, Neptune (American band), Neptune (Holst), Neptune (Italian band), Neptune (Marvel Comics), Neptune (The Duke Spirit album), Neptune (astrology), Neptune (band), Neptune (company), Neptune (cruise missile), Neptune (disambiguation), Neptune (galleon), Neptune (god), Neptune (mythology), Neptune (owarai), Neptune (planet), Neptune (ship), Neptune: Wikipedia, the Free Encyclopedia [home, info]
17. Neptune: Online Plain Text English Dictionary [home, info]
18. neptune: Webster's Revised Unabridged, 1913 Edition [home, info]
19. Neptune: Rhymezone [home, info]
20. Neptune: AllWords.com Multi-Lingual Dictionary [home, info]
21. Neptune: Encarta® Online Encyclopedia, North American Edition [home, info]
22. Neptune (Astronomy), Neptune (Deity): 1911 edition of the Encyclopedia Britannica [home, info]
23. neptune: Free Dictionary [home, info]
24. neptune: Mnemonic Dictionary [home, info]
25. neptune: WordNet 1.7 Vocabulary Helper [home, info]
26. Neptune: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. Neptune: Dictionary/thesaurus [home, info]
28. Neptune: Dictionary of Phrase and Fable (1898) [home, info]

Art (2 matching dictionaries)

29. Neptune: Global Glossary [home, info]
30. Neptune, neptune: An Etymological Dictionary of Classical Mythology [home, info]

Computing (2 matching dictionaries)

31. Neptune: Free On-line Dictionary of Computing [home, info]
32. Neptune (Planet), Neptune (Roman religion and mythology), Neptune (astronomy), Neptune: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

33. Neptune: Medical Dictionary [home, info]
34. Neptune, neptune: online medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

35. Neptune: Brilliant Dream Dictionary [home, info]
36. NEPTUNE: Acronym Finder [home, info]
37. Neptune: AbbreviationZ [home, info]

Science (4 matching dictionaries)

38. Neptune: LITTLE EXPLORERS(TM) Picture Dictionary [home, info]
39. Neptune: Eric Weisstein's World of Astronomy [home, info]
40. Neptune: Extragalactic Astronomy [home, info]
41. NEPTUNE: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

42. Neptune: Urban Dictionary [home, info]

Tech (2 matching dictionaries)

43. Neptune: Basics of Space Flight Glossary [home, info]
44. Neptune: Latitude Mexico [home, info]

(Note: See neptunian for more definitions.)

Quick definitions from WordNet (Neptune) ▸ noun:  a giant planet with a ring of ice particles; the 8th planet from the sun ▸ noun:  (Roman mythology) god of the sea; counterpart of Greek Poseidon ▸ name:  A surname (very rare: popularity rank in the U.S.: #22774) ▸ Also see neptunian ▸ Word origin ▸ Words similar to neptune ▸ Usage examples for neptune ▸ Popular adjectives describing neptune ▸ Words that often appear near neptune ▸ Rhymes of neptune ▸ Invented words related to neptune