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English definition of “twin”

twin

noun [C]     /twɪn/
B1 either of two children born to the same mother on the same occasion: My sister has twin sons. a twin sisterParents and children one of two very similar things: The two countries are often regarded as economic twins.Similar and the sameDescribing people with the same qualities
(Definition of twin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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