A double is a

look-alike A look-alike, double, or doppelgänger is a person who bears a strong physical resemblance to another person, excluding cases like twins and other instances of family resemblance. Some look-alikes have been notable individuals in their own right, ...

doppelgänger A doppelgänger (), a compound noun formed by combining the two nouns (double) and (walker or goer) (), doppelgaenger or doppelganger is a biologically unrelated look-alike, or a double, of a living person. In fiction and mythology, a doppelg ...

; one person or being that resembles another. Double, The Double or Dubble may also refer to:

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'' (1971 film), an Italian film * ''The Double'' (2011 film), a spy thriller film * ''The Double'' (2013 film), a film based on the Dostoevsky novella * ''

Kamen Rider Double , is a 2009-2010 Japanese tokusatsu drama, the eleventh series in the Heisei period run of the Kamen Rider Series and the twentieth overall. It premiered following the finale of ''Kamen Rider Decade'' on September 6, 2009, and aired alongside ''S ...

'', a 2009–10 Japanese television series ** Kamen Rider Double (character), the protagonist in a Japanese television series of the same name

Food and drink

* Doppio, a double shot of espresso * Dubbel, a strong Belgian Trappist beer or, more generally, a strong brown ale * 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 ** , in contract bridge ** Doubling cube, in backgammon * Double, villain in the video game '' Mega Man X4'' * A kart racing game '' Mario Kart: Double Dash'' * An arcade action game '' Double Dragon''

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 * Andrew Dubble, the primary character in the ''

Andrew Lost ''Andrew Lost'' is a series of children's science fiction adventure novels written by J. C. Greenburg and published by Random House from 2002 to 2008. It features a boy inventor named Andrew Dubble whose inventions rarely work the way he expect ...

'' children's novels

Mathematics and computing

Multiplication Multiplication (often denoted by the cross symbol , by the mid-line dot operator , by juxtaposition, or, on computers, by an asterisk ) is one of the four elementary mathematical operations of arithmetic, with the other ones being additi ...

by 2 * Double precision, a floating-point representation of numbers that is typically 64 bits in length * A

split-complex number In algebra, a split complex number (or hyperbolic number, also perplex number, double number) has two real number components and , and is written z=x+yj, where j^2=1. The ''conjugate'' of is z^*=x-yj. Since j^2=1, the product of a number wi ...

of the form

x+yj

, where

j^2=+1

* A 2- tuple, or ordered list of two elements, commonly called an

ordered pair In mathematics, an ordered pair (''a'', ''b'') is a pair of objects. The order in which the objects appear in the pair is significant: the ordered pair (''a'', ''b'') is different from the ordered pair (''b'', ''a'') unless ''a'' = ''b''. (In con ...

, denoted

(a,b)

Double (manifold) In the subject of manifold theory in mathematics, if M is a manifold with boundary, its double is obtained by gluing two copies of M together along their common boundary. Precisely, the double is M \times \ / \sim where (x,0) \sim (x,1) for all x \ ...

, in topology

Music

Double album A double album (or double record) is an audio album that spans two units of the primary medium in which it is sold, typically either records or compact disc. A double album is usually, though not always, released as such because the recording i ...

, audio album spanning two units of the primary medium in which it is sold, typically records and CDs *

Doubling (voicing) In music theory, voicing refers to two closely related concepts: # How a musician or group distributes, or spaces, notes and chords on one or more instruments # The simultaneous vertical placement of notes in relation to each other; this rela ...

, a kind of musical voicing *

Double variation The double variation (also known as alternating variations) is a musical form used in classical music. It is a type of theme and variations that employs two themes. In a double variation set, a first theme (to be called A here) is followed by a ...

, a variation form in music * Pasodoble, a traditional couple's dance from Spain * Double (singer) (born 1975), Japanese R&B singer * Double (band), Swiss pop duo that had their biggest hit in 1986 with "Captain of Her Heart" * ''Double'' (Roch Voisine album), a 1990 album by Roch Voisine * ''Double'' (Zhao Wei album), a 2005 album by Zhao Wei * "Double" (BoA song), 2003 * "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 François-Joseph Double (1776–1842) was a French physician and co-founder of the Académie Nationale de Médecine.Domenico Gabrielli, ''Dictionnaire historique du cimetière du Père-Lachaise XVIIIe et XIXe siècles'', Paris, éd. de l'Amateur, ...

(1776–1842), French physician * Marie-Louise Double de Saint-Lambert (1891–1974), French philanthropist later known as Countess

Lily Pastré Countess Lily Pastré (a.k.a. Marie-Louise Double de Saint-Lambert) (1891–1974) was a French heiress and patron of the arts. She sheltered many Jewish artists in her Château Pastré in Marseille during World War II. After the war, she helped es ...

* Steve Double (born 1966), British Conservative Party politician, Member of Parliament (MP) for St Austell and Newquay since 2015

Places

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

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), a specific instance of the above that occurred during the 1995 Major League Baseball season * Double (cricket), the feat of scoring a thousand first-class runs and taking a hundred first-class wickets in a single season *

Double (volleyball) A double occurs in volleyball when a player, during a match, is credited with scoring at least ten times in one (or more) of five statistical categories: aces, kills, blocks, digs, and assists. The term was apparently derived from similar bask ...

, scoring ten or more in a statistical category (aces, kills, blocks, digs, or assists) in a single match * Double-double (basketball), accumulating ten or more in two of five statistical categories (points, rebounds, assists, steals, or blocks) in a single game * Double Duty, a driver attempting to compete in the Indycar Indianapolis 500 and NASCAR Coca-Cola 600 on the same day * The Double (Gaelic games), the act of winning the All-Ireland Senior Football Championship and the All-Ireland Senior Hurling Championship in the same year * The Double (rugby league), winning the Super League and Challenge Cup in one season

Other

* Double, a bet which combines two selections; see Glossary of bets offered by UK bookmakers#Double * Polish Enigma doubles, replicating the function of Nazi Germany's cipher machines * Double, a former fraction of the

Guernsey pound The pound is the currency of Guernsey. Since 1921, Guernsey has been in currency union with the United Kingdom and the Guernsey pound is not a separate currency but is a local issue of sterling banknotes and coins, in a similar way to the bankno ...

* Double, a former rank of liturgical feast in the Roman Rite of the Catholic Church * Double-flowered form of plants