Definition of unknown
: not known or not well-known; also : having an unknown value an unknown quantity
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Examples of unknown in a Sentence
a disease of unknown cause
Much remains unknown about his early life.
Her music was previously unknown outside of Asia.
An unknown number of cases go unreported.
The victim's attacker was unknown to her.
For some unknown reason, my computer crashed.
a book of unknown poems
First Known Use of unknown
14th century
unknown
Definition of unknown
1 : one that is not known or not well-known; especially : a person who is little known (as to the public)
2 : something that requires discovery, identification, or clarification: such asa : a symbol (such 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
explorers venturing off into the unknown
A fear of the unknown kept her from changing jobs.
The director cast an unknown in the lead role.
We're facing too many unknowns.
First Known Use of unknown
1597
UNKNOWN Defined for English Language Learners
unknown
playDefinition of unknown for English Language Learners
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: not known
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: not well-known : not famous
unknown
Definition of unknown for English Language Learners
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the unknown : a place, situation, or thing that you do not know about or understand
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: a person who is not famous or well-known
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: something that is not known or not yet discovered
UNKNOWN Defined for Kids
Definition of unknown for Students
: 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
Definition of unknown for Students
: one (as a quantity) that is unknown
Learn More about unknown
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See words that rhyme with unknown Thesaurus: All synonyms and antonyms for unknown Spanish Central: Translation of unknown Nglish: Translation of unknown for Spanish speakers Britannica English: Translation of unknown for Arabic speakers
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