Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “x”

See all translations

x

noun uk   /eks/ us  

x noun (AMOUNT)

[U] used to represent a number, or the name of person or thing that is not known or stated: If 2x = 8, then x = 4. Witness x stated that she had seen Cooper on repeated occasions.

x noun (KISS)

[C] ( plural x's) used at the end of an informal piece of writing to represent a kiss: Write soon, all my love, Katy xxx

x noun (MISTAKE)

[C] ( plural x's) written on an answer to a question to show that the answer is not correct

x

verb [T] uk   /eks/ ( present tense x's, present participle x'ing, past tense and past participle x'ed) US us  
to remove something from a list: I x'ed out all the names of the people I wouldn't be sending cards to.
(Definition of x from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of x?
Add Cambridge dictionaries to your browser to your website

Definitions of “x” in other dictionaries

SMART Thesaurus: Mathematical symbols

“x”: synonyms and related words:

You can also find related words, phrases, and synonyms in the topics:

Word of the Day

cold snap

a short period of cold weather

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More