x

noun, adj, character and 2 more — 14 senses

X

nounalso spelled X

/ks/ · /ɡz/

1

Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature.

2

Ball games, Games, Hobbies, Lacrosse, Lifestyle, Sports The spot behind the goal.

Derived terms
X marks the spot, X out, XXX, XO, xo, XOXO, xoxo

X

adj
1

Intersex or non-binary (in passports and identification documents).

  • So last summer, when the Massachusetts State Legislature became one of the first in the nation to consider a bill to add an “X” option for nonbinary genders to the “M” and “F” on the state driver’s license, El, 17, was less surprised than some at the maneuver that effectively killed it.2019 May 29, Amy Harmon, “Which Box Do You Check? Some States Are Offering a Nonbinary Option”, in The New York Times, archived from the original on 08 Jun 2019:

x

character
1

Letter, Lowercase The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.

2

Letter, Lowercase Forming gender-neutral or otherwise more inclusive versions of words, especially Spanish-derived words by replacing both the masculine -o and feminine -a.

  • alumnx, Chicanx (Xicanx), Filipinx, Latinx, Mx, mxn, Tejanx, womxn
Derived terms
-x, x-risk, x-word, moto-x, x-, x-dressing, x-height, x-wing
Related terms
@, -x

x

num
1

Humorous, Sometimes An unknown or unspecified number of.

  • David Cameron gives a Commons statement after every EU summit and normally they follow a predictable pattern; he says that he set out with X number of aims, and then he explains he has achieved all X of them (even if he hasn’t). The most interesting comments normally come in the exchanges with MPs.2016 February 22, Andrew Sparrow, “David Cameron's swipe at Boris Johnson in the Commons – verdict”, in The Guardian:
  • But chances are that Google will continue to float new ideas before eventually merging the best of them into a single, coherent application, as it did with Hangouts. And then it'll start the process again. In the meantime, Google will spend money developing x number of duplicate apps, and users will have to deal with a confusing mess of applications on their home screens.2016 May 19, Aaron Souppouris, “Why Google can't stop making messaging apps”, in Engadget:
Derived terms
-x, x-axis, x-band, x-intercept, x unit

x

conj
1

Lifestyle Slang Used between the names of two characters to denote a ship, particularly in anime, manga, and video games.

  • If there is anyone in the audience who can't stand someone pushing a Shinji x Rei thing, I know you want to quit on this fic now.1998 August 31, Greg Upchurch, “[Eva][Fanfic] Aright”, in rec.arts.anime.creative (Usenet):
  • I'm a fairly big Angel x Buffy fan, though I'm not a particularly big fan of Angel. They just work well together, IMO.2002 July 7, Arnold Kim, “Re: Favorite couples??”, in alt.tv.buffy-v-slayer (Usenet):
1 more example
  • Tho' my doujinshi is a Cloud x Sephiroth - yes you read that right - Cloud's name is first. ^^!2003 April 29, sephigirl, “Re: [OT] Character selections was: Re: [POLL] Identification”, in alt.fan.utena (Usenet):
2

Entertainment, Lifestyle, Music Used in place of and in artist collaborations.

  • Taska Black x DROELOE, Steve Aoki x Lauren Jauregui, etc.
Related terms
-x, x-caboquinho, x-cat-ik

X

num

Etymology Introduced by René Descartes in the context of mathematical notation, but has since widened to other contexts.

1

An unknown quantity or unknown value.

  • Let X represent the forecast traffic flow in 20 years’ time.
  • To know whether a word X is heterological, we must already know what X means. (By contrast, I can know that the word “subdermatoglyphic” has certain syntactic properties—it is six-syllabled, contains the letter “m”, etc.— without having any idea of its meaning.) This indirectness is fine as long as X already has an assigned meaning, for in that case the meaning of “heterological” is ultimately grounded. But when X is the word “heterological”, then we are trying to define “heterological” in terms of itself. We have a closed circle, and a contradictory one, due to the negation operator in the definition.2020 January 30, Richard Johns, “Why Physicalism Seems to Be (and Is) Incompatible with Intentionality”, in Acta Analytica, →DOI, archived from the original on 10 Jul 2025, pages 7-8:
Derived terms
Ancestor X, ATR-X syndrome, cardiac syndrome X, double X, Generation X, Malcolm X tea, Planet X, X chromosome, X factor, X-machine, X-outing, X-patent, X-sona, 45,X, 45,X0, triple X syndrome, X-ALD, X-linked, X-linked gene, X-linked trait, XX, XXX, XXXX

X

character
1

Letter, Uppercase The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.

X

noun

Etymology Presumably by abbreviation of the pronunciation of ecstasy.

1

Slang Ecstasy, a particular street drug.

  • You can find me in the club, bottle full of bub'. Look, mami, I got the X if you into takin' drugs.2003 January 7, “In da Club” (track 5), in Get Rich or Die Tryin', performed by 50 Cent:
  • Tonight the kids will go out and party down in a more righteous mode. Alcohol and not a few tabs of X will be ingested. Club music will throb through big speakers.2008, Stephen King, Graduation Weekend:
1 more example
  • I'm a love druggie falling for these drug junkies. Come n call on me besides these X parties. It's fucking hard on my body.2018 June 8, “Love Druggie”performed by Mendoza:

X

adj
1

Dated Suitable only for those aged sixteen or (later) eighteen years and over.

UK film certificate

2

Obscene; adult; pornographic; XXX.

  • If you go to an X movie you do so knowingly, as does everyone else in the audience. Or if the same thing comes up on TV you can switch over, or, if you wish, enjoy it in relative privacy.1976, Movie Maker, volume 10, numbers 1-6, page 364:
Derived terms
XXX, XXXX

X

noun

Etymology From cross, due to the X symbol being a cross saltire.

1

Cross, crossing.

  • Kennington via Charing X
Derived terms
ped xing, xdress, xdresser, xing, X-talk

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for X and x.