Double

Double can mean:

In baseball, a double is a two-base hit.
An action in many games, including bridge and backgammon whereby a competitor raises the stakes to around twice their previous level.
In Dance Dance Revolution, a double is a gamemode where you play using both dance-pads.
In computer science, double is used as shorthand for double precision.
In English football, a team is said to win the double when they win the league and the F.A. Cup in the same season. Likewise in Scotland, with the SPL and Scottish Cup.
Double is sometimes used to refer to a person who could be a twin, a body double, or an impersonator.
A Double is a former fraction of the Guernsey pound, equal to ½ farthing, or ¹/₁₉₂₀ pound
Double were a Swiss pop duo (from Zürich) that had their biggest hit in 1986 with "The Captain of Her Heart". (official website: [link])
Double is the stage name of a popular female Japanese pop artist.
Double is an unincorporated community in Stokes County, North Carolina.
In classical psychodrama, the Double is the role that speaks as the client's "inner voice," often expanding what is said or hinted.
In folklore and the supernatural, double means doppelgänger.