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X1 **, x** plural X's, x's

1## letter

[uncountable and countable]SLA the 24th letter of the English alphabet

2HMN## number

[countable] the number 10 in the system of roman numerals

3## mathematics

[uncountable] technicalHM a letter used in mathematics to represent an unknown quantity or value :

if 3x = 6, x = 2

4## on school work

SE [countable] a mark used on school work to show that a written answer is not correct

5## when voting

PPV [countable] a mark used to show that you have chosen something on an official piece of paper, for example when voting

6## on a letter

TCM [countable] a mark used to show a kiss, especially at the end of a letter :

Love, Cindy XXX

7## film

[singular, uncountable]AMF used in the past to describe a film that was officially approved as only suitable for people over 18 [= 18] ➔ X-rated

8## unknown/secret name

[uncountable] a letter used instead of someone's or something's real name because you want to keep it secret or you do not know it :

At the trial, Ms X said that she had known the defendant for three years.

9## when signing your name

[countable] a mark used instead of a signature by someone who cannot write

10## X number of people/things

used to say that there are a number of people or things when the exact number is not important

11## X marks the spot

used on maps in adventure stories to show that something is buried in a particular place

Definition of X from the Longman Dictionary of Contemporary English within

the topic NUMBERS

the topic NUMBERS

add
addition
bi-
billion
calculate
constant
D
demi-
division
eight
eleven
equal(a)
equal(v)
even
factor(n)
factor(v)
fifth
fig.
figure
five
four
fourth
gross
hundred
L
M
million
multiple
-nd
negative
nine
No.
nos.
number
O
one
pi
plot
point
positive
product
-rd
root
round
score
second
set
six
square(n)
square(v)
-st
sum
take
ten
thousand
three
tri-
twenty
twice
unit
V
X
zero

Show all entries from Topic: NUMBERS

Show all entries from Topic: NUMBERS