We found 37 dictionaries that define the word obsidian:

General (23 matching dictionaries)

1. obsidian: Longman Dictionary of Contemporary English
2. obsidian: Merriam-Webster
3. obsidian: Oxford Learner's Dictionaries
4. obsidian: American Heritage Dictionary of the English Language
5. obsidian: Collins English Dictionary
6. obsidian: Vocabulary.com
7. Obsidian, obsidian: Wordnik
8. obsidian: Cambridge Advanced Learner's Dictionary
9. obsidian: Wiktionary
10. obsidian: Webster's New World College Dictionary, 4th Ed.
11. obsidian: The Wordsmyth English Dictionary-Thesaurus
12. obsidian: Infoplease Dictionary
13. obsidian: Dictionary.com
14. obsidian: Online Etymology Dictionary
15. Obsidian (album), Obsidian (comics), Obsidian (disambiguation), Obsidian: Wikipedia, the Free Encyclopedia
16. Obsidian: Online Plain Text English Dictionary
17. obsidian: Webster's Revised Unabridged, 1913 Edition
18. obsidian: Rhymezone
19. Obsidian: AllWords.com Multi-Lingual Dictionary
20. obsidian: Webster's 1828 Dictionary
21. obsidian: FreeDictionary.org
22. obsidian: Mnemonic Dictionary
23. obsidian: TheFreeDictionary.com

Art (1 matching dictionary)

24. Beading Glossary (No longer online)

Computing (1 matching dictionary)

25. obsidian: Encyclopedia

Medicine (1 matching dictionary)

26. online medical dictionary (No longer online)

Miscellaneous (3 matching dictionaries)

27. Brilliant Dream Dictionary (No longer online)
28. obsidian: A Word A Day
29. obsidian: Wordcraft Dictionary

Science (5 matching dictionaries)

30. Archaeology Wordsmith (No longer online)
31. Obsidian: LITHICS-NET's Glossary of Lithics Terminology
32. OBSIDIAN: The Mineral Gallery
33. obsidian: Dictionary of Geology
34. Anthropology dictionary (No longer online)

Slang (1 matching dictionary)

35. Obsidian: Urban Dictionary

Tech (2 matching dictionaries)

36. National Glass Association Glossary (No longer online)
37. Illustrated Glass Dictionary (No longer online)

(Note: See obsidians as well.)

Definitions from Wiktionary (obsidian) ▸ noun:  (mineralogy) A type of naturally occurring black glass produced by volcanoes. ▸ noun:  A slightly bluish black, the color of obsidian glass. ▸ adjective:  (poetic) Black. Similar: basalt, volcanic glass, byssolite, onyx, hornblende, perlite, rock glass, augite, volcanite, bokite, more... Opposite: pumice, pumicite Types: black obsidian, rainbow obsidian, mahogany obsidian, apache tears, fire obsidian, more... Phrases: obsidian hydration, obsidian dating, snowflake obsidian, obsidian hydration dating, Obsidian Entertainment, more... Adjectives: black, green, polished, gray, red, volcanic, glassy, grey, most, mexican, dark Colors:     black,     onyx,     charcoal,     graphite,     coal, more... ▸ Word origin ▸ Words similar to obsidian ▸ Usage examples for obsidian ▸ Idioms related to obsidian ▸ Wikipedia articles (New!) ▸ Popular adjectives describing obsidian ▸ Popular nouns described by obsidian ▸ Words that often appear near obsidian ▸ Rhymes of obsidian ▸ Invented words related to obsidian