X is the 24th letter of the English alphabet.

X may also refer to:

Arts, entertainment, and media Fictional entities X (Dark Horse Comics), character and its namesake series X (Mega Man), protagonist of the Mega Man X video game series X (The X-Files), television series character Radio X, the fictional radio station broadcasting the Grand Theft Auto: San Andreas soundtrack X, symbol used on treasure maps in fiction to show the location of the hidden treasure X Marks the Spot (disambiguation) X, character from the fourth season of Battle for Dream Island, an animated web series X Parasite, element of the 2002 game Metroid Fusion

Film X (1963 film), subtitled The Man with the X-Ray Eyes, an American science fiction film X (1986 film), Norwegian drama directed by Oddvar Einarson X (1996 film), anime film directed by Rintaro, based on the X manga by CLAMP X (2022 film), American horror film directed by Ti West X the Unknown, 1956 British science fiction horror film X, alternate title for Malcolm X (1992 film), directed by Spike Lee X: Night of Vengeance, a 2011 thriller by Australian director Jon Hewitt X: Past Is Present, 2015 Indian anthology film X rating, designation for adult-only films

Literature X (Cage book), by avant garde composer John Cage X (magazine), quarterly review of literature and the arts X (manga), 1992 Japanese manga by CLAMP X (Grafton novel), 2015, by Sue Grafton X (young adult novel), 2015, by Ilyasah Shabazz and Kekla Magoon "X: A Fabulous Child's Story", 1972 short story and 1978 picture book by Lois Gould X: Or, Betty Shabazz v. The Nation, 2017 play by Marcus Gardley The 'X' Documents, 1974 collection of British reports on German opposition to Hitler based on meetings with Carl Friedrich Goerdeler 'X' Stands for Unknown, 1984 collection of science essays by Isaac Asimov

Music Bands

X (American band), punk band X (Australian band), punk band X Japan, Japanese metal band, originally named X from 1982 to 1992 X:IN, multinational girl group based in South Korea

Albums X (Klaus Schulze album), 1978 X (Gnags album), 1983 X (INXS album), 1990 X (K-Ci & JoJo album), 2000 X (Def Leppard album), 2002 X (Anna Vissi album), 2002 X (Kristeen Young album), 2004 X the album, a Christian compilation album series starting in 2004 X (Liberty X album), 2005 X (Intocable album), 2005 X (Fourplay album), 2006 X (Kylie Minogue album), 2007 X (Trace Adkins album), 2008 X (Spock's Beard album), 2010 X (Royal Hunt album), 2010 X (Roll Deep album), 2012 X (The 69 Eyes album), 2012 x (Chris Brown album), 2014 X (Ed Sheeran album) (read as "Multiply"), 2014 X (Agnez Mo album), 2017 X (The Driver Era album), 2019 X (Ken Carson album), 2022 X (Stam1na album), 2023 X (Lucki mixtape), 2015 X (pH-1 mixtape), 2020 X, a Philippine hip-hop album by Ex Battalion X (Nonpoint album), 2018 X: The Godless Void and Other Stories, 2020, by ...And You Will Know Us by the Trail of Dead Ten (Sault album), (also styled X) 2022 X, 2025 studio album by Maya Berović X, 2024 extended play by Maya Berović

Operas X, The Life and Times of Malcolm X, 1986

Songs "X", by Miss Li "X" (21 Savage and Metro Boomin song) "X" (Chris Brown song) "X" (Jonas Brothers song) "X" (Liberty X song) "X" (Nicky Jam and J Balvin song) "X" (Poppy song) "X" (Xzibit song) "X" (Arca song) "X", from the album The Circle by B'z "X", from the album Neysluvara by Hatari "X", from the album Undeniable by Hellyeah "X", from the album Pain Is Love by Ja Rule featuring Missy Elliott and Tweet "X", from the album Future History by Jason Derulo "X", from the album Luv Is Rage 2 by Lil Uzi Vert "X", from the extended play The Code by Monsta X "X", from the album The Magic Position by Patrick Wolf "X", from the album Angels & Demons by Peter Andre "X", from the album Black Panther by ScHoolboy Q, 2 Chainz, Saudi, and Kendrick Lamar "X", from the album X by Stam1na "X", from the album Toxicity by System of a Down "X", from the album Blue Blood by X Japan "X", from the album In the Court of the Dragon by Trivium "X", from the album X by Ken Carson

Stations WXNY-FM, known as "La X 96.3", a Spanish radio station in New York City XETRA-FM/91.1 MHz, licensed to Tijuana, using the moniker "91X" Radio X (United Kingdom), British radio station which grew out of the former XFM

Roller coasters X2 (roller coaster), at Six Flags Magic Mountain, California, formerly known as X The Walking Dead: The Ride in Thorpe Park, England, formerly known as X

Television Kamen Rider X, Japanese series in the Kamen Rider franchise Ultraman X, 2015 Japanese tokusatsu series X (TV series), Japanese anime series based on the X manga by CLAMP The Ark, 1966 Doctor Who serial (production code X)

Video games X (1992 video game), a 3D game for the Nintendo Game Boy console X (video game series), a science fiction space simulator series by Egosoft X (Xbox show), an annual trade show hosted by Microsoft

World Wide Web XVideos, internet pornography-video sharing and viewing website X (social network), formerly "Twitter", known as X since 2023, an American social networking service Twitter under Elon Musk

Companies X Development, Google's in-house incubator established in 2010 X Corp., the parent company of social network X X.com (bank), the predecessor of PayPal X.Org Foundation, non-profit corporation responsible for developing the X Window System United States Steel Corporation (stock symbol "X")

Other organizations X (demo party), Dutch demoscene party which started in 1995 Organization X, paramilitary, anti-communist, royalist organization in Greece, active during the Axis occupation and the Civil War X University, informal interim name of Toronto Metropolitan University, formerly Ryerson University x:talk, London-based cooperative network project to support migrant sex workers

Language scripts and phonetics X, typographical approximation the Greek letter chi (Χ) Kha (Cyrillic), letter of the Cyrillic script x, used in the International Phonetic Alphabet for the voiceless velar fricative , used in the International Phonetic Alphabet for the voiceless uvular fricative

People In arts and entertainment Director X (born 1975), Canadian music video director, also known as X and Little X Márcia X (1959–2005), Brazilian performer and visual artist Princess X (musician), former stage name of musician Liza Fox (active since 2010) DMX (rapper) (1970–2021), American rapper commonly referred to as "X" Shaun Ryder (born 1962), English musician also known as X Terminator X (born 1966), stage name for American DJ Norman Roberts, who worked with Public Enemy XXXTentacion (1998–2018), American rapper commonly referred to as "X" X, ring name of Canadian wrestler Carl Ouellet (born 1967) X, working name of American artist Santiago X (born 1982)

Other people X González (born 1999), American gun control activist Clyde X (1931–2009), Nation of Islam official Khoisan X (1955–2010), political activist Laura X (born 1940), feminist historian Malcolm X (1925–1965), civil rights activist Michael X (1933–1975), activist and criminal Xiuhtezcatl Martinez (born 2000), climate activist, often known as "X" X, the girl in the X Case, landmark court case about abortion in Ireland X, pseudonymous author of the 1947 Foreign Affairs "X Article", formally titled "The Sources of Soviet Conduct" X, surname often assumed by members of the Nation of Islam

Science, technology, and mathematics Astronomy X, signifying a comet of unknown orbit Galaxy X (galaxy), postulated dark galaxy Planet X, hypothesised planet in the outer solar system

Biology and chemistry × (or x), used in some types of hybrid names in botany X chromosome, sex determinant in many animal species, including mammals A halogen or halide in organic chemistry (pseudoelement symbol "X")

Computing and electronics OS X (pronounced 'OS ten'), former name of the Apple macOS operating system X Window System, referred to as X or X11, a client-server display protocol often used in UNIX environments X file format, used by DirectX X, the mnemonic for the execute instruction on the TI-990 and the TMS9900 X#, high-level assembler for the x86 processor architecture as part of the Cosmos operating system iPhone X, smartphone by Apple Inc.

Mathematics X, Roman numeral for 10, a number x, axis in the Cartesian coordinate system x, variable for unknown or changing concepts in mathematics A typographical approximation for: Cross product (×) Multiplication sign (× or ✕)

Physics X boson, hypothetical particle X (charge), conserved quantum number in particle physics X band, part of the microwave band of the electromagnetic spectrum X unit, unit of length in physics

Other uses in technology

Fujica X-mount, bayonet lens mount used on manual-focus Fujica 35mm film SLR cameras in the 1970s and 1980s Fujifilm X-mount, fully electronic bayonet lens mount used on Fujifilm mirrorless APS-C digital cameras and XF lenses since 2012 Nilgiri Mountain Railway X class

Automobiles Tesla Model X, electric crossover by Tesla HiPhi X, electric crossover automobile produced from 2020 Zeekr X, battery electric compact crossover SUV BMW X models, series of SUV models

Other uses Generation X, the Western sociological generation born after Boomers or Jonesers, and before Millennials X (fragrance), set by Irish pop vocal band Westlife X (gender identity), used on passports and identification documents to denote intersex or indeterminate gender X mark, common written symbol of negation or affirmation Strike (bowling), indicated with an X in scorekeeping Kiss, as part of "xoxo" for "hugs and kisses" MDMA, recreational drug Straight edge lifestyle ╳, box-drawing character Ⓧ, Japanese typographic symbol used in resale price maintenance The legal signature of an illiterate person

See also

The X (disambiguation) TEN (disambiguation) 10 (disambiguation) Xs (disambiguation) X's (disambiguation) X force (disambiguation) X.com (disambiguation) XX (disambiguation) XXX (disambiguation) XXXX (disambiguation) ✕ (disambiguation)