Definition of septuagenary
1 : based on the number 70
2 : 70 or between 70 and 80 years old
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of septuagenary
Latin septuagenarius, from septuageni seventy each (from septuaginta seventy) + -arius -ary
Seen and Heard
What made you want to look up septuagenary? Please tell us where you read or heard it (including the quote, if possible).