# Double

Double, The Double or Dubble may refer to:

## Mathematics and computing

* Multiplication by 2
* Double precision, a floating-point representation of numbers that is typically 64 bits in length
* A double number of the form $x+yj$, where $j^{2}=+1$
* A 2-tuple, or ordered list of two elements, commonly called an ordered pair, denoted $(a,b)$
* Double (manifold), in topology

## Food and drink

* A drink order of two shots of hard liquor in one glass
* A "double decker", a hamburger with two patties in a single bun

## Games

* Double, action in games whereby a competitor raises the stakes
** double, in contract bridge
** Doubling cube, in backgammon
** Double, doubling a blackjack bet in a favorable situation
** Double, a bet offered by UK bookmakers which combines two selections
* Double, villain in the video game Mega Man X4
* A kart racing game Mario Kart: Double Dash
* An arcade action game Double Dragon

## Sports

* Double (association football), the act of a winning a division and primary cup competition in the same season
* Double (baseball), a two-base hit in baseball
** The Double (Seattle Mariners), Edgar Martinez's walk-off double in Game 5 of the 1995 American League Division Series
* Double (cricket), the feat of scoring a thousand first-class runs and taking a hundred first-class wickets in a single season
* Double (volleyball), scoring ten or more in a statistical category (aces, kills, blocks, digs, or assists) in a single match
* Double (Gaelic games), the act of winning the All-Ireland Senior Football Championship and the All-Ireland Senior Hurling Championship in the same year
* Double (rugby league), winning the Super League and Challenge Cup in one season
* Double-double (basketball), accumulating ten or more in two key statistical categories – points, rebounds, assists, steals, and blocked shots – in a single game
* Double Duty, competing in the Indianapolis 500 and Coca-Cola 600 on the same day or weekend.

## Entertainment
### Literature

* The Double (Dostoevsky novel), an 1846 novella by Fyodor Dostoevsky
* The Double (Saramago novel), a 2002 novel by José Saramago
* Double (manga), a 2019 manga series by Ayako Noda

### Film and television

* Double (filmmaking), someone who substitutes for the credited actor of a character
* The Double (1934 film), a German crime comedy film
* The Double (1963 film), a British film, part of the Edgar Wallace Mysteries series
* The Double (1971 film), an Italian film
* The Double (2011 film), a spy thriller film
* The Double (2013 film), a film based on the Dostoevsky novella
* The Double (TV series), a 2024 Chinese historical drama
* Kamen Rider Double, a 2009–10 Japanese television series
** Kamen Rider Double (character), the protagonist in a Japanese television series of the same name

### Music

* Double album, audio album spanning two units of the primary medium in which it is sold, typically records and CDs
* Double variation, a variation form in music
* Double (band), a Swiss pop duo
* Double (singer) (born 1975), a Japanese R&B singer
* Double (Roch Voisine album) (1990)
* Double (Zhao Wei album) (2005)
* "Double" (BoA song) (2003)
* "Double", a song by Blackbear from Digital Druglord (2017)
* "Double", by Yeat from 2 Alive (2022)
* "The Double", an instrumental by Clint Mansell from the Black Swan soundtrack (2010)
* The Double Violin Concerto (Bach) in D minor, BWV 1043, commonly referred to as "The Double" among violinists

## People

* Baron Emile Double (1869–1938), vigneron who established the vineyard at Château de Beaupré
* François-Joseph Double (1776–1842), French physician
* Marie-Louise Double de Saint-Lambert (1891–1974), French philanthropist later known as Countess Lily Pastré
* Steve Double (born 1966), British politician and Member of Parliament

## Places

* Double (lunar crater), in Mare Tranquillitatis
* Double Lake, a lake in Minnesota, US

## Other uses

* Double, also called a look-alike or doppelgänger, one person or being that resembles another
* Polish Enigma double, a machine replicating the function of Nazi Germany's cipher machines
* Double, a former fraction of the Guernsey pound
* Double, a former rank of liturgical feast in the Roman Rite of the Catholic Church
* Dubbel, a strong Belgian Trappist beer or, more generally, a strong brown ale
* A double, a shorthand for an instance of double tradition, verses duplicated in the Biblical gospels of Matthew and Luke