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English definition of “septuagenarian”

septuagenarian

noun [C]     /ˌsep.tjʊə.dʒɪˈneə.ri.ən/ US  /-tu.ə.dʒəˈner.i-/
a person who is between 70 and 79 years old The elderlyOld or old-fashionedDescribing people who are oldDescribing age and birthdays
(Definition of septuagenarian noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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