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24th letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. In English it has no peculiar sound, but stands for the combination ks as in fox, or gz as in exempt, or, initially, for the sound of z as in xenia. In words from Greek, x transliterates the 14th Greek letter, xi, a letter perhaps quite unrelated to the Roman x in form. The formal Greek correspondent of x was chi, hence it is used in phonetics to represent a velar fricative like ch in loch. As the initial of the name Christ, X has become a symbol for it, e.g., in Xmas and in the monogram XP (chi rho). In Roman numerals X stands for 10.
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What does it mean when you dream about an X?

X in a dream can refer to the Roman numeral for ten, for “X marks the spot” in a map, the cross, an error, or “X-rated.”

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.


McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


Used in various speech and writing contexts (also in lowercase) in roughly its algebraic sense of "unknown within a set defined by context" (compare N). Thus, the abbreviation 680x0 stands for 68000, 68010, 68020, 68030 or 68040, and 80x86 stands for Intel 80186, Intel 80286, Intel 80386 or Intel 80486. A Unix hacker might write these as 680[0-4]0 and 80[1-4]86 or 680?0 and 80?86 respectively; see glob.


An alternative name for the X Window System.


A suffix for the speed of a CD-ROM drive relative to standard music CDs (1x). 32x is common in September 1999.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)


(1) (eXit) To exit, close or delete. See X button.

(2) (heX) In programming, a symbol used to identify a hexadecimal number. For example, "0x0A" and "\x0A" specify the hex number 0A. See also X Window and MDI-X port.

(3) (times the original) A performance rating for optical drives, based on rotation speed (RPM) of the platter. Each "x" means "times the speed of the first specification," thus 10x means 10 times as fast as the original drive. See CD-ROM drives and DVD drives.

(4) (x-) The prefix used to describe a MIME type. For example, x-pdf and x-gzip refer to PDF and Gnu ZIP file formats, respectively. See MIME type.

(5) A prefix for cross; for example, x-platform means "cross-platform." See cross platform.

(6) (Mac OS X) X is the Roman Numeral for 10; thus OS X means "OS 10." See Mac OS X.

(7) (eXperience) See UX designer and user experience.
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References in periodicals archive ?
The summarized C2C performance of Company X's top suppliers and customers over the most recent four years is presented in Exhibits 6 and 7.
We would regard X's confusion as cured if we had reason to withdraw our attitude of semantic charity.
X's gross receipts derived from allowing customers online access to X's newspaper
The temporal dysphoria invoked by Baldwin's refusal to separate clearly the stages of Malcolm X's life story poses an insuperable problem to anyone invested in stories of America's already-achieved progress.
Intern X's serum mercury levels drawn 21 days and 38 days after the initial exposure were 182 ng/mL and 17 ng/mL, respectively.
John's Gospel is interpreted by some scholars as a reference to Leo X's first baptismal name of Giovanni, his other names being Damaso and Romolo.
Second, X's conduct might justify a claim of equitable subordination of X's claim to that of [C.sub.1].
Nas X's track was the longest-running track at the No.1 position on the chart and after nine consecutive weeks in the second position, 'Bad Guy' holds the record for most weeks spent in the runner-up spot before rising to the top.
However, the Ombudsman stated it was not possible to conclude that Mrs X's deterioration was solely caused by her continued stay in hospital.
BTS' Jungkook topped the list of 2018's Top K-pop Stars followed by BTS' Jimin, V, Suga, Jin, J-Hope and RM, EXO's Baekhyun, Chanyeol, Kai and Sehun, NCT's Jaehyun, and Haechan, Stray Kids' Bang Chan, EXO's Xiumin, NCT's Jaemin and Doyoung, GOT7's Jackson, Monsta X's Wonho, NCT's Mark, EXO's Suho, NCT's Jungwoo, Jeno, WinWin and Yuta, EXO's Chen, NCT's Renjun, Stray Kids' Hyunjin, and Seventeen's Vernon and Jeonghan.