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English definition of “double”

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double

adjective uk   /ˈdʌb.l̩/ us  
A2 twice the size, amount, price, etc., or consisting of two similar things together: I ordered a double espresso (= two standard amounts in one cup). Go through the double doors and turn left. The word "cool" has a double "o" in the middle. Everything he says has a double meaning (= has two possible meanings). This painkiller is double strength (= has twice the normal amount of medicine). UK Sabiha's phone number is double three, one, five, double seven (= 331577). A double flower or plant is a flower with more than the usual number of petals: a double primrose
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double

noun uk   /ˈdʌb.l̩/ us  

double noun (PERSON)

[C usually singular] a person who looks exactly the same as someone else: Hey, Tony, I met someone at a party last week who was your double.

double noun (TWO PLAYERS)

doubles [U] a game of tennis or a similar sport between two teams of two people: men's/women's/mixed doubles Who won the men's doubles at Wimbledon this year?
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double noun (TWO WINS)

[usually singular] UK an occasion when a football team wins two major competitions in a single season: Which was the first team to do the double in English football?

double noun (BASEBALL)

[C] US in baseball, a hit that allows the batter (= person who hits the ball) to reach second base

double

verb [I or T] uk   /ˈdʌb.l̩/ us  
B2 to become twice as much or as many, or to make something twice as much or many: The government aims to double the number of students in higher education within 25 years. Company profits have doubled since the introduction of new technology.
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double

noun, predeterminer uk   /ˈdʌb.l̩/ us  
B1 something that is twice the amount, size, strength, etc. of something else: I paid double (= twice as much) for those trousers last week. Electrical goods are almost double the price they were a few years ago. "Would you like another whisky?" "Yes. Make it a double (= two standard amounts in one glass)."
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double

adverb uk   /ˈdʌb.l̩/ us  
in two parts or layers: Fold the blanket double (= so that it is in two layers) and then you won't be cold. They were bent double (= their heads and shoulders were bent forward and down) from decades of work in the fields.see double to have a problem with your eyes so that you see two of everything, usually because you are drunk or ill: I started seeing double, then I fainted.
(Definition of double from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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