American English

Definition of septuagenarian noun from the Oxford Advanced American Dictionary

 

septuagenarian

 noun
noun
NAmE//ˌsɛptuədʒəˈnɛriən//
 
, NAmE//ˌsɛptʃuədʒəˈnɛriən//
 
(formal)
 
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a person between 70 and 79 years old
See the Oxford Advanced Learner's Dictionary entry: septuagenarian