twice as much or as many:the jail now houses almost double the number of prisoners it was designed forI’ll pay double what I paid last time
a number or amount which is twice as large as a contrasting or usual number or amount:he paid double and had a room all to himself
1consisting of two equal, identical, or similar parts or things:double doors
having twice the usual size, quantity, or strength:she sipped a double brandy
designed to be used by two people:a double bed
having two different roles or interpretations, especially in order to deceive or confuse:the furtive double life of a terrorist
(of a letter or number) occurring twice in succession:‘otter’ is spelled with a double t
(of a flower) having more than one circle of petals:large double blooms
(of a domino) having the same number of pips on each half.
2 Music lower in pitch by an octave.
at or to twice the amount or extent:you have to be careful, and this counts double for older people
1a thing which is twice as large as usual or is made up of two standard units or things:join the two sleeping bags together to make a double
a double measure of spirits:‘Two whiskies, and make it doubles please’
a type of bet in which two selections are made, with any winnings from the first being transferred to the second.
Bridge a call that will increase the penalty points won by the defenders if the declarer fails to make the contract.
Darts a hit on the narrow ring enclosed by the two outer circles of a dartboard, scoring double:you must finish the game on a double
2a person who looks exactly like another:you could pass yourself off as his double
a person who stands in for an actor in a film.
an apparition of a living person:she had seen her husband’s double
3 (doubles) (especially in tennis and badminton) a game or competition involving sides made up of two players:the semi-finals of the doubles
4 Bell-ringing a system of change-ringing using five bells, with two pairs changing places each time.
5a pair of victories in the same sport in two different competitions:Manchester United won the double twice
British a home and away victory over the same team in one season or competition:Oldham did the double over Forest last season
1 [no object] become twice as much or as many:profits doubled in one year
[with object] make twice as much or as many of (something):Clare doubled her income overnight
[with object] archaic amount to twice as much as:thy fifty yet doth double five and twenty
Military move at twice the usual speed; run:I doubled across the deck to join the others
Bridge make a call increasing the value of the penalty points to be scored on an opponent’s bid if it wins the auction and is not fulfilled:West’s failure to double 4♥ [no object]:it may be right for East to double
2 [with object] fold or bend (paper, cloth, or other material) over on itself:the muslin is doubled and then laid in a sieve over the bowl
clench (a fist):he had one arm around her and the other fist doubled
Snooker pot (a ball) by making it rebound off a cushion.
Nautical sail round (a headland):we struck out seaward to double the headland of the cape
3 [no object] be used in or play another, different role:a laser printer doubles as a photocopier
[with object] (of an actor) play (two parts) in the same piece.
Music play two or more musical instruments.
[with object] Music add the same note in a higher or lower octave to (a note).
at the double (USon the double)
at running speed; very fast:he disappeared at the double
bend over into a stooping position:the boy bent double and disappeared inside the hide
be seeing double
seem to see two images of one object.
double or quits (USdouble or nothing)
a gamble to decide whether a loss or debt should be doubled or cancelled.
go back in the direction one has come:he had to double back to collect them
chiefly US (in blackjack) double a bet after seeing one’s initial cards, with the requirement that one additional card be drawn:the amount only increases when you choose to split or double downhe doubled down on a pair and lost
strengthen one’s commitment to a particular strategy or course of action, typically one that is potentially risky:he decided to double down and escalate the warthe third quarter of the year saw central banks doubling down on the quantitative easing approach
1bend over or curl up, typically because one is overcome with pain or laughter:Billy started to double up with laughter
2share a room:‘Where’s Jimmy going to sleep?’ ‘He can double up with Bertie.’
3use the winnings from a bet as stake for another bet.