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English definition of “nightcap”

nightcap

noun [C] uk   /ˈnaɪt.kæp/ us  

nightcap noun [C] (DRINK)

a drink, sometimes an alcoholic drink, that someone has just before going to bed

nightcap noun [C] (HAT)

a type of hat made from soft cloth and worn in bed, especially in the past
(Definition of nightcap from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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