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BNC: 1553 COCA: 0

x
1 x noun
or X /ˈɛks/
plural x's or xs or X's or Xs /ˈɛksəz/
1 x
noun
or X /ˈɛks/
plural x's or xs or X's or Xs /ˈɛksəz/
Learner's definition of X
1 
: the 24th letter of the English alphabet英语字母表的第24个字母
[count]
[noncount]
2 
[count] : the Roman numeral that means 10（罗马数字）十
3 
[noncount] mathematics
a  — used to represent an unknown quantity表示未知数
b  — used as a symbol for multiplication乘号
4 
[noncount] — used as a symbol between the numbers of a measurement乘（用作测量值之间的乘号）
5 
[noncount] : an unknown thing, person, or quantity未知的事物（人或数量）
6 
[noncount] — used in the phrase x, y, and z to refer to the first thing in a group of three unnamed things用于短语x，y，and z，表示一组三个未名事物中的第一个
7 
[count] — used as a mark at the end of a letter, an e-mail, etc., to represent a kiss代表亲吻的符号（置于书信、电子邮件等末尾）
8 
[count] — used like a signature by a person who cannot write不会写字的人用以代替签名的）X记号，画押
9 
[count] — used on a map or picture to show where someone or something is（地图或图片上）标明所在位置的X符号
10 
[count] — used as a mark to show who or what you are voting for or choosing叉号（表示投票给某人或选择某事物的符号）
2 x /ˈɛks/ verb
x-es also x's or xes /ˈɛksəz/ ; x-ed also x'd or xed /ˈɛkst/ ; x-ing or x'ing /ˈɛksɪŋ/
2 x
/ˈɛks/
verb
x-es also x's or xes /ˈɛksəz/ ; x-ed also x'd or xed /ˈɛkst/ ; x-ing or x'ing /ˈɛksɪŋ/
Learner's definition of X

x out

[phrasal verb]
x (something) out or x out (something)
: to draw an x or a series of x's through (something) to show that it is wrong or not wanted用x符号标出（错误）；用x符号删除

X
X /ˈɛks/
X
/ˈɛks/
Learner's definition of X
— used in the past as a special mark to indicate that no one under the age of 17 in the U.S. or 18 in the U.K. was allowed to see a particular movie in a movie theater*X级（过去的影片分级用语，美国17岁以下、英国18岁以下青少年不宜观看的电影的标记）
— compare g, nc-17, pg, pg-13, r; see also x-rated
BNC: 1553 COCA: 0

See also: F/X

x

1 of 5

noun

ˈeks How to pronounce x (audio)
plural x's or xs ˈek-səz How to pronounce x (audio)
often capitalized, often attributive
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 Table of Numbers
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

x

2 of 5

verb

x-ed also x'd or xed ˈekst How to pronounce x (audio) ; x-ing or x'ing ˈek-siŋ How to pronounce x (audio)

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

x

3 of 5

abbreviation

1
cross
2
ex
3
experimental
4
extra

x

4 of 5

symbol

1
a
times
2 x 3 = 6
The picture was enlarged 3x [=enlarged to three times the original size].
b
by
—used in measurements
an 8x11 sheet of paperAn early 20th century Persian Hamadan Gallery carpet with a camel hair ground, measuring 10.10 x 5.5. — The Magazine Antiques
2
by
—used in nonmathematical constructions
He drove a 4x4 vehicle.

X

5 of 5

adjective

ˈeks How to pronounce X (audio)
of a motion picture
: of such a nature that admission is denied to persons under a specified age (such as 17)
—used before the adoption of NC-17

Synonyms

Verb

Example Sentences

Noun a word that starts with an x a word that starts with x

Word History

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1a

Verb

circa 1849, in the meaning defined at sense 1

Adjective

1970, in the meaning defined above

Time Traveler
The first known use of x was before the 12th century

Phrases Containing x

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BNC: 1553 COCA: 0

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