Topic: MATHS
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X1 , x
plural X's, x's
plural X's, x's1 the 24th letter of the English alphabet
letter
[uncountable and countable]SLA2HMN the number 10 in the system of roman numerals
number
[countable]3 a letter used in mathematics to represent an unknown quantity or value : if 3x = 6, x = 2
mathematics
[uncountable] technicalHMif 3x = 6, x = 24 a mark used on school work to show that a written answer is not correct
on school work
SE [countable]5 a mark used to show that you have chosen something on an official piece of paper, for example when voting
when voting
PPV [countable]6 a mark used to show a kiss, especially at the end of a letter : Love, Cindy XXX
on a letter
TCM [countable]Love, Cindy XXX7 used in the past to describe a film that was officially approved as only suitable for people over 18 [= 18] ➔ X-rated
film
[singular, uncountable]AMF8 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.
unknown/secret name
[uncountable]At the trial, Ms X said that she had known the defendant for three years.9 a mark used instead of a signature by someone who cannot write
when signing your name
[countable]10 used to say that there are a number of people or things when the exact number is not important
X number of people/things
11 used on maps in adventure stories to show that something is buried in a particular place
