Usually means: Not known, identified, or understood.
Definitions Related words Phrases (New!) Mentions Lyrics History Colors (New!)
We found 40 dictionaries that define the word unknown:

General (30 matching dictionaries)
  1. unknown: Longman Dictionary of Contemporary English
  2. unknown, the unknown: Merriam-Webster
  3. unknown, the unknown: Oxford Learner's Dictionaries
  4. unknown: American Heritage Dictionary of the English Language
  5. unknown: Collins English Dictionary
  6. unknown: Vocabulary.com
  7. Unknown, unknown: Wordnik
  8. unknown: Cambridge Advanced Learner's Dictionary
  9. unknown: Wiktionary
  10. unknown: Webster's New World College Dictionary, 4th Ed.
  11. unknown: The Wordsmyth English Dictionary-Thesaurus
  12. unknown: Infoplease Dictionary
  13. unknown: Dictionary.com
  14. unknown (adj.): Online Etymology Dictionary
  15. unknown: Cambridge Essential American English Dictionary
  16. The Unknown (Animorphs), The Unknown (Madeline Juno album), The Unknown (Over the Garden Wall), The Unknown (The Vision Bleak album), The Unknown (novel), Unknown (Rasputina album), Unknown (Tekken), Unknown (magazine), Unknown (mathematics), Unknown (video game), Unknown: Wikipedia, the Free Encyclopedia
  17. Unknown: Online Plain Text English Dictionary
  18. unknown: Webster's Revised Unabridged, 1913 Edition
  19. unknown: Rhymezone
  20. unknown: AllWords.com Multi-Lingual Dictionary
  21. unknown: Webster's 1828 Dictionary
  22. Unknown: E Cobham Brewer, The Reader's Handbook
  23. unknown: Stammtisch Beau Fleuve Acronyms
  24. Unknown: Dictionary of Phrase and Fable (1898)
  25. unknown: FreeDictionary.org
  26. unknown: Mnemonic Dictionary
  27. unknown: TheFreeDictionary.com
  28. unknown: Wikimedia Commons US English Pronunciations

Business (2 matching dictionaries)
  1. Bouvier's Law Dictionary 1856 Edition (No longer online)
  2. unknown: Legal dictionary

Computing (1 matching dictionary)
  1. unknown: Encyclopedia

Miscellaneous (3 matching dictionaries)
  1. Encyclopedia of Graphic Symbols (No longer online)
  2. Brilliant Dream Dictionary (No longer online)
  3. unknown: Idioms

Science (2 matching dictionaries)
  1. Unknown, unknown: Botanical Name listing of Plants
  2. Unknown: Eric Weisstein's World of Mathematics

Slang (1 matching dictionary)
  1. unknown: Urban Dictionary

Tech (1 matching dictionary)
  1. DOD Dictionary of Military Terms (No longer online)

(Note: See unknowns as well.)

Definitions from Wiktionary (
)
American English Definition British English Definition
adjective:  (sometimes postpositive) Not known; unidentified; not well known.
noun:  (algebra) A variable (usually x, y or z) whose value is to be found.
noun:  Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
noun:  A person of no identity; a nonentity.

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    obsidian,     midnight,     abyss,     shadow,     eclipse, more...



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Similar:

Opposite:

Types:

Phrases:

Adjectives:

Colors:
    obsidian,     midnight,     abyss,     shadow,     eclipse, more...



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