X, x

[ eks ]
/ ɛks /

noun, plural X's or Xs, x's or xs.

the 24th letter of the English alphabet, a consonant.
any spoken sound or combination of sounds represented by the letter X or x, as in xylene, box, or exact.
something having the shape of an X.
a written or printed representation of the letter X or x.
a device, as a printer's type, for reproducing the letter X or x.

Definition for x (2 of 7)

x

[ eks ]
/ ɛks /

verb (used with object), x-ed or x'd [ekst] /ɛkst/, x-ing or x'ing [ek-sing] /ˈɛk sɪŋ/.

to cross out or mark with or as if with an x (often followed by out): to x out an error.
to indicate choice, as on a ballot or examination (often followed by in): to x in the candidate of your choice.

Origin of x

First recorded in 1840–50

Definition for x (3 of 7)

x


Stock Exchange.
  1. (of stock trading) ex dividend.
  2. (of bond trading) ex interest.

Definition for x (4 of 7)

x


Symbol.

Definition for x (5 of 7)

Definition for x (6 of 7)

X


Symbol.

Definition for x (7 of 7)

chi

1
[ kahy ]
/ kaɪ /

noun, plural chis.

the twenty-second letter of the Greek alphabet (X, χ).
the consonant sound represented by this letter.

Origin of chi

1
From Greek
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for x

British Dictionary definitions for x (1 of 5)

x

X

/ (ɛks) /

noun plural x's, X's or Xs

the 24th letter and 19th consonant of the modern English alphabet
a speech sound sequence represented by this letter, in English pronounced as ks or gz or, in initial position, z, as in xylophone

British Dictionary definitions for x (2 of 5)

x


symbol for

commerce banking finance ex
maths the x- axis or a coordinate measured along the x- axis in a Cartesian coordinate system
an algebraic variable

British Dictionary definitions for x (3 of 5)

X


symbol for

Word Origin for X

(sense 6) from the form of the Greek letter khi (Χ), first letter of Khristos Christ

British Dictionary definitions for x (4 of 5)

chi

1
/ (kaɪ) /

noun

the 22nd letter of the Greek alphabet (Χ, χ), a consonant, transliterated as ch or rarely kh

British Dictionary definitions for x (5 of 5)

chi

2

ch'i or qi

/ (tʃiː) /

noun

(sometimes capital) (in Oriental medicine, martial arts, etc) vital energy believed to circulate round the body in currents

Word Origin for chi

Chinese, literally: energy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012