1

unknown

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adjective un·known \ˌən-ˈnōn\

Definition of unknown

  1. :  not known or not well-known; also :  having an unknown value an unknown quantity

Examples of unknown in a sentence

  1. a disease of unknown cause

  2. Much remains unknown about his early life.

  3. Her music was previously unknown outside of Asia.

  4. An unknown number of cases go unreported.

  5. The victim's attacker was unknown to her.

  6. For some unknown reason, my computer crashed.

  7. a book of unknown poems

14th Century

First Known Use of unknown

14th century


2

unknown

noun un·known

Definition of unknown

  1. 1 :  one that is not known or not well-known; especially :  a person who is little known (as to the public)

  2. 2 :  something that requires discovery, identification, or clarification: such asa :  a symbol (as x, y, or z) in a mathematical equation representing an unknown quantityb :  a specimen (as of bacteria or mixed chemicals) required to be identified as an exercise in appropriate laboratory techniques

Examples of unknown in a sentence

  1. explorers venturing off into the unknown

  2. A fear of the unknown kept her from changing jobs.

  3. The director cast an unknown in the lead role.

  4. We're facing too many unknowns.

1597

First Known Use of unknown

1597



UNKNOWN Defined for English Language Learners

1

unknown

play
adjective un·known \ˌən-ˈnōn\

Definition of unknown for English Language Learners

  • : not known

  • : not well-known : not famous


2

unknown

noun un·known

Definition of unknown for English Language Learners

  • the unknown : a place, situation, or thing that you do not know about or understand

  • : a person who is not famous or well-known

  • : something that is not known or not yet discovered


UNKNOWN Defined for Kids

1

unknown

play
adjective un·known \ˌən-ˈnōn\

Definition of unknown for Students

  1. :  not known … it was cut all over with strange lines and figures that might be the letters of an unknown language. — C. S. Lewis, The Lion, the Witch and the Wardrobe


2

unknown

play
noun un·known

Definition of unknown for Students

  1. :  one (as a quantity) that is unknown



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