unknown
Use Unknown in a sentence
adjective
1.
not known; not within the range of one's knowledge, experience, or understanding; strange; unfamiliar.
2.
not discovered, explored, identified, or ascertained: the unknown parts of Antarctica.
3.
not widely known; not famous; obscure: an unknown writer.
noun
4.
a thing, influence, area, factor, or person that is unknown: the many unknowns in modern medicine; The director cast an unknown in the leading role.
5.
Mathematics. a symbol representing an unknown quantity: in algebra, analysis, etc., frequently represented by a letter from the last part of the alphabet, as x, y, or z.
00:10
Unknown
is always a great word to know.
So is cube. Does it mean:
| the third power of a quantity such as a cubed = a?a?a |
| a rational number or the limit of a sequence of rational numbers, as opposed to a complex number |
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
|
Link To unknown
Collins
World English Dictionary
unknown (ʌnˈnəʊn) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —adj | |
| 1. | not known, understood, or recognized |
| 2. | not established, identified, or discovered: an unknown island |
| 3. | not famous; undistinguished: some unknown artist |
| 4. | unknown quantity a person or thing whose action, effect, etc, is unknown or unpredictable |
| —n | |
| 5. | an unknown person, quantity, or thing |
| 6. | maths a variable, or the quantity it represents, the value of which is to be discovered by solving an equation; a variable in a conditional equation: 3y = 4x + 5 is an equation in two unknowns |
| un'knownness | |
| —n | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Online Etymology Dictionary, © 2010 Douglas Harper
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Cite This Source
Example sentences
Pain can be mysterious, untreatable and debilitating, and its causes can be unknown.
At this early stage, the importance of viral parasites to human health or the environment is unknown.
More intense headaches are caused by unknown mechanisms.
There is no known treatment for the disease, the cause of which is unknown.
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