septuagenarian

[ sep-choo-uh-juh-nair-ee-uhn, -too-, -tyoo- ]
/ ˌsɛp tʃu ə dʒəˈnɛər i ən, -tu-, -tyu- /

adjective

of the age of 70 years or between 70 and 80 years old.

noun

a septuagenarian person.

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Origin of septuagenarian

1705–15; <Latin septuāgēnāri(us) (see septuagenary) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for septuagenarian

British Dictionary definitions for septuagenarian

septuagenarian
/ (ˌsɛptjʊədʒɪˈnɛərɪən) /

noun

a person who is from 70 to 79 years old

adjective

being between 70 and 79 years old
of or relating to a septuagenarian

Word Origin for septuagenarian

C18: from Latin septuāgēnārius, from septuāgēnī seventy each, from septuāgintā seventy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012