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The following statistics are based on the British National Corpus, so they are representative for the British English.

Distribution of usage frequency for the most common synonyms of the noun unknown:


Distribution of usage frequency for the most common synonyms of the adjective unknown:


The word unknown is considered to be an easy one, according to the Dale-Chall word list, which includes 3000 words that all fourth-grade American students should know and understand.

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Definition of the adjective unknown

What does unknown mean as an attribute of a noun?

adjective - degrees: -

  1. not known
  2. being or having an unknown or unnamed source
  3. not known to exist
    • example: things obscurely felt surged up from unknown depths
    • similar: unsuspected
  4. not famous or acclaimed
  5. not known before
    • example: don't let anyone unknown into the house
    • synonym of unknown: strange
    • similar: unfamiliar

Alternative definition of the adjective unknown


  1. Not known; unidentified; not well known.

Definition of the noun unknown

What does unknown mean as a name of something?

noun - plural: unknowns

  1. an unknown and unexplored region
    • example: they came like angels out the unknown
    • lexical domain: Locations - nouns denoting spatial position
    • synonyms of unknown: terra incognita / unknown region
    • more generic word: region = a large indefinite location on the surface of the Earth
  2. anyone who does not belong in the environment in which they are found
  3. a variable whose values are solutions of an equation
    • lexical domain: Communicative Processes - nouns denoting communicative processes and contents
    • synonym of unknown: unknown quantity
    • more generic word: variable = a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity

Alternative definition of the noun unknown


  1. [algebra] A variable (usually x, y or z) whose value is to be found.
  2. Any fact or place about which nothing is known (as in the phrase "into the unknown").
  3. A person of no identity; a nonentity


  1. "Unknown" is a 2006 American crime-thriller film directed by Colombian filmmaker Simon Brand and starring Jim Caviezel, Greg Kinnear, Bridget Moynahan, Joe Pantoliano and Barry Pepper about a group of men kidnapped and locked in a factory with no memory of how they arrived there. Piecing together information around them, they realize that some were kidnapped and some were the kidnappers. They decide they must work together to figure out how to get away before the gang that captured them returns.
  2. "Unknown" White Male is a 2011 film directed by Jaume Collet-Serra.


Unknown is a fictional character from the 2012 horror film Under the Bed.

Phrases with Unknown

  1. unknown region
  2. unknown soldier
  3. Unknown Unknown
  4. unknown quantity
  5. Unknown Stygobromid

Printed dictionaries and other books with definitions for Unknown

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Google previewEncyclopedia of Movement Disorders (2010)

Unknown ...

Google previewThe British Encyclopedia, Or Dictionary of Arts and Sciences (1809)

Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge : Illustrated with Upwards of 150 Elegant Engravings. A - B. 1 by William Nicholson

Find an expression for one of the unknown quantities, in each equation; put these expressions equal to each other, and ...

Google previewDictionary of Saints (2013)

by Brian Daniel Starr

Country: Ireland Date: 626 Family: Father: Tairdelbach Mother: Unknown Spouse : None Siblings: Saint Flannan Ancestors: A line of Irish for nine generations ending in Conall. Branches of the Tree: The King of Ireland Brian Boroimhe is in this ...

Google previewThe One Percenter Encyclopedia (2011)

The World of Outlaw Motorcycle Clubs from Abyss Ghosts to Zombies Elite by Bill Hayes

Unknown. 9. PLACE. OF. ORIGIN: Manitoba,. Canada. 9. FOUNDER(S):. Unknown. 9. CHAPTER. LOCATIONS: Allegedly. defunct. 9 CLAIM TO FAME: One of the few motorcycle clubs in the 1990s credited with remaining independent as the ...

Google previewDictionary of Military Terms (2009)

by U.S. Department of Defense

casualty status; casualty type; duty status – whereabouts unknown; hostile casualty; nonhostile casualty. casualty category — A term used to specifically classify a casualty for reporting purposes based upon the casualty type and the casualty ...

Online dictionaries and encyclopedias with entries for Unknown

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Photos about Unknown

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If you need related images for an article or a report, you can download stock photos:
Small photo of Dust settles in the Arizona wilderness at dusk as a loan vehicle travels to an unknown destination.Dust settles in the Arizona wilderness at dusk as a loan vehicle travels to an unknown destination.Small photo of LONDON, GREAT BRITAIN - SEPTEMBER 17, 2017: The fresco of Jesus Christ the Teacher in church St. Martin, Ludgate by unknown artist.Small photo of ZARAGOZA, SPAIN - MARCH 1, 2018: The baroque painting of Michael Archangel in church Iglesia de San Felipe y Santiago el Menor by unknown artist.Small photo of Like a Path to Unknown FutureSmall photo of Ubud Bali Indonesia January 2 2011 Unknown man with unknown children on a standing bikeSmall photo of Blackboard Unknown Background Texture/ Blackboard Unknown Background TextureSmall photo of a unknown girl hiker(traveler) standing on the cliff looks at big blue ocean and mountains landscape under bright sky at soft sunrise moment in Hualien, Taiwan. More...

Video language resources about Unknown

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View more videos about The Unknown, Unknown Soldier, and Unknown Unknown.

See also the pronunciation examples of Unknown!

Sign language

Sign language spellcasting (unknown effects)

(unknown effects)

Quotes about Unknown

The mind loves the unknown. It loves images whose meaning is unknown, since the meaning of the mind itself is unknown. (Rene Magritte)
more quotes about unknown...

Scrabble value of U1N1K5N1O1W4N1

The value of this 7-letter word is 14 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

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