X

X (lower case x)

1. The twenty-fourth letter of the basic modern Latin alphabet.

• (Latin script):  Aa  Bb  Cc  Dd  Ee  Ff  Gg  Hh  Ii  Jj  Kk  Ll  Mm  Nn  Oo  Pp  Qq  Rr  Sſs  Tt  Uu  Vv  Ww  Xx  Yy  Zz
• (Variations of letter X):  Ẍẍ  Ẋẋ  ᶍ  Ｘｘ

X

1. Roman numeral ten (10)
2. (ordinal, especially in the names of aristocracy) the tenth.

• x, VV, vv

X

1. A symbol of the IPA, representing a voiceless uvular fricative.
2. (bowling) strike

Possibly from skull and crossbones

X

1. A hazard indicator, sometimes incorporated into standard labelling and signage systems

• XXX

• Letter styles
• 
  Capital and lowercase versions of X, in normal and italic type
• 
  Uppercase and lowercase X in Fraktur

Other representations of X:

• IPA^(key): /ɛks/

• Audio (US)

  (file)

• Rhymes: -ɛks

X

1. An unknown quantity or unknown value.

• IPA^(key): /ks/, IPA^(key): /ɡz/, or at the beginning of words IPA^(key): /z/.

X (upper case, lower case x, plural Xs or X's)

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

• (Latin-script letters) letter; A a, B b, C c, D d, E e, F f, G g, H h, I i, J j, K k, L l, M m, N n, O o, P p, Q q, R r, S s, T t, U u, V v, W w, X x, Y y, Z z

X

1. Any mark that looks like that letter, such as such a mark made by a person who cannot read or write, in lieu of a signature.
2. (lacrosse) The spot behind the goal.

• (signature mark): xoxo

X (not comparable)

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

Presumably by abbreviation of the pronunciation of ecstasy.

X (uncountable)

1. (slang) Ecstasy, a particular street drug.
   • 2008, Stephen King, Graduation Weekend

     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.

X (not comparable)

1. (Britain film certificate, dated) Suitable only for those aged 16 or (later) 18 years and over.
2. (movie rating) Obscene.
   • 1976, Movie Maker (volume 10, issues 1-6, page 364)

     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.

From Christ by abbreviation, from Ancient Greek Χ (Kh, “(letter chi)”), from Χριστός (Khristós, “Christ”).

X

1. (informal) Christ

• Xianity
• Xmas
• Xtopher (rare)

Sign reading “Pedestrian X” (Pedestrian Crossing)

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

X (plural Xes)

1. (Canada, US) Cross, crossing.

• xing

As defined in CIE 1931 color space.

X (uncountable)

1. One of the tristimulus values which, with Y and Z, defines coordinates in a three-dimensional color space. Pronounced big X or cap X.
   • 2003, Charles A. Poynton, Digital Video and HDTV: Algorithms and Interfaces, →ISBN, p. 217:

     X, Y and Z are pronounced big-X, big-Y, and big-Z, or cap-X, cap-Y, and cap-Z, to distinguish them from little x and little y, to be described in a moment.

Part of the pronunciation of transaction

X

1. (databases) A transaction.

   PgSQL gives each transaction a Transaction ID, or XID.

• X marks the spot
• XXX
• XXXX

X

1. The eighth letter in the Afar alphabet.

• (Latin-script letters) A a, B b, T t, S s, E e, C c, K k, X x, I i, D d, Q q, R r, F f, G g, O o, L l, M m, N n, U u, W w, H h, Y y

(transliteration needed) (Stokoe X)

1. The letter X

X upper case (lower case x)

1. The twelfth letter of the Azerbaijani alphabet, written in the Latin script.

• (Latin-script letters) hərf; A a, B b, C c, Ç ç, D d, E e, Ə ə, F f, G g, Ğ ğ, H h, X x, I ı, İ i, J j, K k, Q q, L l, M m, N n, O o, Ö ö, P p, R r, S s, Ş ş, T t, U u, Ü ü, V v, Y y, Z z

• (letter name): IPA^(key): /ɪks/

• Audio

  (file)

X (capital, lowercase x)

1. The twenty-fourth letter of the Dutch alphabet.

• Previous letter: W
• Next letter: Y

X

1. (text messaging) Abbreviation of aŭ (“or”).

• -X

X (upper case, lower case x)

1. The twenty-third letter of the Finnish alphabet, called äks or eks and written in the Latin script.

• Used only in loanwords. In more established loanwords replaced with ks.

• (Latin-script letters) kirjain; A a, B b, C c, D d, E e, F f, G g, H h, I i, J j, K k, L l, M m, N n, O o, P p, Q q, R r, S s (Š š), T t, U u, V v (W w), X x, Y y, Z z (Ž ž), Å å, Ä ä, Ö ö

• IPA^(key): /iks/

• Audio (Paris)

  (file)

X m or f (plural X)

1. X (letter of the Latin alphabet)
2. X-frame stool
   • 1862, Victor Hugo, Les Misérables, I.3.i:

     La duchesse de Duras lisait à trois ou quatre amis, dans son boudoir meublé d’X en satin bleu ciel [...].

     The Duchess de Duras was reading to two or three friends, in a boudoir furnished with X-frame stools in sky-blue satin.

X (invariable)

1. X-rated

• IPA^(key): /ʔɪks/

X (upper case, lower case x)

1. The twenty-fourth letter of the German alphabet.

• IPA^(key): /ks/

X (lower case x)

1. The twenty-fourth letter of the Ido alphabet, written in the Latin script.

• (Latin-script letters) litero; A a, B b, C c, D d, E e, F f, G g, H h, I i, J j, K k, L l, M m, N n, O o, P p, Q q, R r, S s, T t, U u, V v, W w, X x, Y y, Z z

• (name of letter) IPA^(key): /iks/
• (phonetic realization) IPA^(key): [ks]

X m or f (invariable, lower case x)

1. The twenty-fourth letter of the Latin alphabet, called ics in Italian.

• The letter X is not considered part of the Italian alphabet. It is found mainly in loanwords, Latinisms, and Grecisms.

• (Latin-script letters) lettera; A a (À à), B b, C c, D d, E e (É é, È è), F f, G g, H h, I i (Í í, Ì ì, Πî, J j, K k), L l, M m, N n, O o (Ó ó, Ò ò), P p, Q q, R r, S s, T t, U u (Ú ú, Ù ù), V v (W w, X x, Y y), Z z
• Italian alphabet on Wikipedia.Wikipedia

From Japanese × (batsu).

X

1. false.

• O

• OX

Borrowed from Ancient Greek Χ (Kh, “chi”), which represented /ks/ in the dialects of most of the Greek mainland and Euboea.

The sound of X was like that of the Greek Ξ (X, “xi”), that is /ks/, although etymologically it represented not only cs (as in lūx, from luc-s, and dīxī, from dic-si), but also gs (as in lēx, from leg-s; rēxī, from reg-si); hs (as in trāxī, from trah-si; vexī, from veh-si); and chs (as in the word onyx, from onych-s, borrowed from the Greek). The hardening of a softer final (g, h, ch) before s into the с sound, which occurs in the last-mentioned cases, is found also in several roots ending in v and u: nix for niv-s, vīxī for viv-si, connixī for conniv-si, fluxī for fluv-si, from fluō (root fluv; cf. fluvius), struxī for stru-si. Less frequently x has arisen from the combinations ps and ts: proximus for prop-simus (from prope), nīxus for nit-sus (from nītor), the latter being used along with the collateral form nīsus, as also connīvī with connixī, and mistus (from misceō) with mixtus. An exchange of the sounds ss or s and x, took place in axis for assis and laxus for lassus. In the later language of the vulgar, the guttural sound in x disappeared, and s or ss was often written for it; as vis for vix, visit for vīxit, unsit for unxit, conflississet for conflixisset, in late inscriptions; hence regularly in Italian, and frequently in the other Romance tongues, the Latin x is represented by s or ss.

By a mere graphic variation, one of the constituent sounds of x is often expressed in inscriptions (but not the earliest) by an additional с or s; as SACXO or SAXSO for saxō; VCXOR or VXSOR for uxor; CONIVNCX or CONIVNXS for conjunx; even both sounds are sometimes thus expressed, VICXSIT for vīxit.

X (upper case, lower case x)

1. The twenty-third letter of the Latin alphabet, written in the Latin script.

X

1. (cardinal) ten; decem.

• Roman numeral letters: I, V, L, C, D, M.
• Unicode glyphs of Roman numerals: Ⅹ, ⅹ.
• Appendixes: Roman numerals, Latin cardinal numerals

• “X” in Charlton T. Lewis and Charles Short [1907], A New Latin Dictionary.

• (Name of letter) IPA^(key): [ɛk̚s]
• (Phoneme, Syllable initial) IPA^(key): [z]
• (Phoneme, Syllable final) IPA^(key): [k̚s]

X

1. The twenty-fourth letter of the Malay alphabet, written in the Latin script.

• (Latin-script letters) A a, B b, C c, D d, E e, F f, G g, H h, I i, J j, K k, L l, M m, N n, O o, P p, Q q, R r, S s, T t, U u, V v, W w, X x, Y y, Z z

• (Brazil) IPA^(key): /ˈʃis/
• (Portugal) IPA^(key): /ˈʃiʃ/

X (upper case, lower case x)

1. The twenty-fourth letter of the Portuguese alphabet, written in the Latin script.

• (Latin-script letters) letra; A a (Á á, À à,  â, àã), B b, C c (Ç ç), D d, E e (É é, Ê ê), F f, G g, H h, I i (Í í), J j, K k, L l, M m, N n, O o (Ó ó, Ô ô, Õ õ), P p, Q q, R r, S s, T t, U u (Ú ú), V v, W w, X x, Y y, Z z

• xis

• IPA^(key): /iks/

X (lowercase x)

1. The twenty-fifth letter of the Romanian alphabet representing the double-consonant sounds /gz/ and /ks/. Preceded by V and followed by Z.

• IPA^(key): /x̠/

X

1. The thirty-fifth letter of the Saanich alphabet, written in the Latin script.

• (Latin-script letters) A, Á, Ⱥ, B, C, Ć, Ȼ, D, E, H, I, Í, J, K, Ꝁ, Ꝃ, ₭, Ḵ, Ḱ, L, Ƚ, M, N, Ṉ, O, P, Q, S, Ś, T, Ⱦ, Ṯ, Ŧ, U, W, W̲, X, X̲, Y, Z, s, ,

• (phoneme): IPA^(key): /ħ/
• (letter name): IPA^(key): /ħɑ/

X upper case (lower case x)

1. The fifth letter of the Somali alphabet, called xa and written in the Latin script.

1. The fifth letter of the Somali alphabet, which follows Arabic abjad order. It is preceded by J and followed by KH.

• (Latin-script letters) ', B b, T t, J j, X x, Kh kh, D d, R r, S s, Sh sh, Dh dh, C c, G g, F f, Q q, K k, L l, M m, N n, W w, H h, Y y, A a, E e, I i, O o, U u

• IPA^(key): /ˈekis/

X (upper case, lower case x)

1. The 25th letter of the Spanish alphabet.

• (Hà Nội) IPA^(key): [ʔit̚˧˦ si˨˩], [ʔit̚˧˦ si˨˩], [səː˨˩], [səː˨˩ ɲɛ˧˨ʔ]
• (Huế) IPA^(key): [ʔit̚˦˧˥ ʂɪj˦˩], [ʔit̚˦˧˥ sɪj˦˩], [səː˦˩], [səː˦˩ ɲɛ˨˩ʔ]
• (Hồ Chí Minh City) IPA^(key): [ʔɨt̚˦˥ ʂɪj˨˩], [ʔɨt̚˦˥ sɪj˨˩], [səː˨˩], [səː˨˩ ɲɛ˨˩˨] ~ [ʔɨt̚˦˥ sɪj˨˩], [ʔɨt̚˦˥ sɪj˨˩], [səː˨˩], [səː˨˩ ɲɛ˨˩˨]
• Phonetic: ít sì, ít xì, xờ, xờ nhẹ

X (upper case, lower case x)

1. The twenty-eighth letter of the Vietnamese alphabet, called ích, ích xì, xờ, or xờ nhẹ and written in the Latin script.

• (Quốc ngữ letters) chữ; A a (À à, Ả ả, àã, Á á, Ạ ạ), Ă ă (Ằ ằ, Ẳ ẳ, Ẵ ẵ, Ắ ắ, Ặ ặ),  â (Ầ ầ, Ẩ ẩ, Ẫ ẫ, Ấ ấ, Ậ ậ), B b, C c (Ch ch), D d, Đ đ, E e (È è, Ẻ ẻ, Ẽ ẽ, É é, Ẹ ẹ), Ê ê (Ề ề, Ể ể, Ễ ễ, Ế ế, Ệ ệ), G g (Gh gh, Gi gi), H h, I i (Ì ì, Ỉ ỉ, Ĩ ĩ, Í í, Ị ị), K k (Kh kh), L l, M m, N n (Ng ng, Ngh ngh, Nh nh), O o (Ò ò, Ỏ ỏ, Õ õ, Ó ó, Ọ ọ), Ô ô (Ồ ồ, Ổ ổ, Ỗ ỗ, Ố ố, Ộ ộ), Ơ ơ (Ờ ờ, Ở ở, Ỡ ỡ, Ớ ớ, Ợ ợ), P p (Ph ph), Q q (Qu qu), R r, S s, T t (Th th, Tr tr), U u (Ù ù, Ủ ủ, Ũ ũ, Ú ú, Ụ ụ), Ư ư (Ừ ừ, Ử ử, Ữ ữ, Ứ ứ, Ự ự), V v, X x, Y y (Ỳ ỳ, Ỷ ỷ, Ỹ ỹ, Ý ý, Ỵ ỵ)

X (upper case, lower case x)

1. The twenty-fourth letter of the Zulu alphabet, written in the Latin script.

• (Latin-script letters) A a, B b, C c, D d, E e, F f, G g, H h, I i, J j, K k, L l, M m, N n, O o, P p, Q q, R r, S s, T t, U u, V v, W w, X x, Y y, Z z