x
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.1x
noun, often capitalized often attributive \ˈeks\ plural x's or xs \ˈek-səz\
Definition of X
1
a : the 24th letter of the English alphabet b : a graphic representation of this letter c : a speech counterpart of orthographic x
2
: ten — see number table
3
: a graphic device for reproducing the letter x
4
: one designated x especially as the 24th in order or class, or the first in an order or class that includes x, y, and sometimes z
5
: an unknown quantity
6
: something shaped like or marked with the letter X
See Examples of X
- a word that starts with an x
- a word that starts with x
First Known Use of X
before 12th century
2x
verbx–ed also x'd or xed \ˈekst\ x–ing or x'ing \ˈek-siŋ\
Definition of X
transitive verb
1
: to mark with an x
2
: to cancel or obliterate with a series of x's —usually used with out <x-ed out the mistake>
First Known Use of X
circa 1849
3x
abbreviationDefinition of X
1
cross
2
ex
3
experimental
4
extra
Other Physics Terms
X
adjective \ˈeks\Definition of X
of a motion picture : of such a nature that admission is denied to persons under a specified age (as 17) —used before the adoption of NC-17
First Known Use of X
1970
Learn More About X
Seen & Heard 
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