[ sep-choo-uh-juh-nair-ee-uhn, -too-, -tyoo- ]
/ ˌsɛp tʃu ə dʒəˈnɛər i ən, -tu-, -tyu- /
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of the age of 70 years or between 70 and 80 years old.
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. 2022


What does septuagenarian mean?

A septuagenarian is someone in their 70s (70 to 79 years old), or someone who is 70 years old.

Septuagenarian can also be used as an adjective to describe someone in their 70s, as in Our audience is mostly made up of septuagenarian women, or things related to such a person, as in I have entered my septuagenarian years. 

It’s one of several similar terms used to refer to a person of a certain age, including quadragenarian (40s), quinquagenarian (50s), sexagenarian (60s), octogenarian (80s), and nonagenarian (90s).

Such words are more commonly used as people get older: quadragenarian and quinquagenarian are rarely used, but septuagenarian and octogenarian are more commonly used.

Another word for septuagenarian is septuagenary.

Example: Today is my last day as a septuagenarian—tomorrow I begin my 80s!

Where does septuagenarian come from?

The word septuagenarian comes from the Latin word septuāgēnārius, from septuāgēnī, meaning “seventy each,” from septuāgintā, “seventy.” The suffix -an is used to indicate a person (as seen in common words like pedestrian and historian).

It’s more common to refer to someone as a 70-year-old or describe them as in their 70s or 70-something than to call them a septuagenarian. But septuagenarian is used as a fancy or fun way of referring to someone of that age, including by septuagenarians who apply it to themselves. As much fun as it is to say, it’s perhaps more often used in writing. It’s often used in the context of highlighting a person who’s doing something that may be surprising for their age, as in My septuagenarian yoga instructor is way more flexible than I am.

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What are some synonyms for septuagenarian?

  • septuagenary
  • 70-year-old
  • seventy-year-old
  • 70-something
  • seventy-something

What are some words that share a root or word element with septuagenarian

What are some words that often get used in discussing septuagenarian?

How is septuagenarian used in real life?

Septuagenarian is often used to be fancy or funny when referring to 70-somethings.



Try using septuagenarian!

Is septuagenarian used correctly in the following sentence?

Most of my fondest memories have come from my septuagenarian years.

How to use septuagenarian in a sentence

British Dictionary definitions for septuagenarian

/ (ˌsɛptjʊədʒɪˈnɛərɪən) /

a person who is from 70 to 79 years old
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