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English definition of “firstborn (child)”

firstborn (child)

noun [C usually singular]     /ˌfɜːst.bɔːnˈtʃaɪld/ US  /ˌfɝːst.bɔːrn-/
the first child of a set of parents: Olaf is my firstborn.Parents and children
(Definition of firstborn (child) noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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