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English definition of “next door”

next door

adverb, adjective (also next-door)    
B1 in the next room , house , or building : A Russian couple have just moved in next door . Who lives next door to you? Margot is our next-door neighbour .Next to and beside
(Definition of next door adverbadjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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