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We found 42 dictionaries with English definitions that include the word umbra:
Click on the first link on a line below to go directly to a page where "umbra" is defined.

General (27 matching dictionaries)

1. umbra: Merriam-Webster.com [home, info]
2. Umbra, umbra: Oxford Dictionaries [home, info]
3. umbra: American Heritage Dictionary of the English Language [home, info]
4. umbra: Collins English Dictionary [home, info]
5. umbra: Vocabulary.com [home, info]
6. Umbra, umbra: Wordnik [home, info]
7. umbra: Wiktionary [home, info]
8. umbra: Webster's New World College Dictionary, 4th Ed. [home, info]
9. umbra: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. umbra: Infoplease Dictionary [home, info]
11. umbra: Dictionary.com [home, info]
12. umbra: Online Etymology Dictionary [home, info]
13. umbra: UltraLingua English Dictionary [home, info]
14. Umbra (3D technology company), Umbra (World of Darkness), Umbra (company), Umbra (disambiguation), Umbra (fish), Umbra (poets), Umbra (typeface), Umbra: Wikipedia, the Free Encyclopedia [home, info]
15. Umbra: Online Plain Text English Dictionary [home, info]
16. umbra: Webster's Revised Unabridged, 1913 Edition [home, info]
17. umbra: Rhymezone [home, info]
18. Umbra: AllWords.com Multi-Lingual Dictionary [home, info]
19. umbra: Webster's 1828 Dictionary [home, info]
20. Umbra: E Cobham Brewer, The Reader's Handbook [home, info]
21. Umbra: Dictionary of Phrase and Fable (1898) [home, info]
22. Umbra: 1911 edition of the Encyclopedia Britannica [home, info]
23. umbra: Free Dictionary [home, info]
24. umbra: Mnemonic Dictionary [home, info]
25. umbra: WordNet 1.7 Vocabulary Helper [home, info]
26. umbra: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. umbra: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

28. umbra-: A Cross Reference of Latin and Greek Elements [home, info]

Business (1 matching dictionary)

29. umbra: Legal dictionary [home, info]

Computing (1 matching dictionary)

30. umbra: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

31. umbra: online medical dictionary [home, info]
32. umbra: Medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

33. UMBRA: Acronym Finder [home, info]
34. umbra: Wordcraft Dictionary [home, info]

Science (4 matching dictionaries)

35. Umbra: Extragalactic Astronomy [home, info]
36. umbra: Nine Planets Glossary [home, info]
37. Umbra: Atmospheric Chemistry and Air Quality [home, info]
38. UMBRA, UMBRA: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

39. Umbra: Urban Dictionary [home, info]

Tech (3 matching dictionaries)

40. umbra: Lighting Design Glossary [home, info]
41. Umbra: National Weather Service Glossary [home, info]
42. umbra: SOLAR-TERRESTRIAL TERMS [home, info]

(Note: See umbras for more definitions.)

Quick definitions from WordNet (umbra) ▸ noun:  a region of complete shadow resulting from total obstruction of light ▸ Also see umbras ▸ Word origin ▸ Words similar to umbra ▸ Usage examples for umbra ▸ Popular adjectives describing umbra ▸ Words that often appear near umbra ▸ Rhymes of umbra ▸ Invented words related to umbra