We found 30 dictionaries that define the word octogenarian:

General (24 matching dictionaries)

1. octogenarian: Longman Dictionary of Contemporary English
2. octogenarian: Merriam-Webster
3. octogenarian: Oxford Learner's Dictionaries
4. octogenarian: American Heritage Dictionary of the English Language
5. octogenarian: Collins English Dictionary
6. octogenarian: Vocabulary.com
7. Octogenarian, octogenarian: Wordnik
8. octogenarian: Cambridge Advanced Learner's Dictionary
9. octogenarian: Wiktionary
10. octogenarian: Webster's New World College Dictionary, 4th Ed.
11. octogenarian: The Wordsmyth English Dictionary-Thesaurus
12. octogenarian: Infoplease Dictionary
13. octogenarian: Dictionary.com
14. octogenarian: Online Etymology Dictionary
15. Octogenarian: Wikipedia, the Free Encyclopedia
16. Octogenarian: Online Plain Text English Dictionary
17. octogenarian: Webster's Revised Unabridged, 1913 Edition
18. octogenarian: Rhymezone
19. Octogenarian: AllWords.com Multi-Lingual Dictionary
20. octogenarian: FreeDictionary.org
21. octogenarian: Mnemonic Dictionary
22. octogenarian: TheFreeDictionary.com

Computing (1 matching dictionary)

23. octogenarian: Encyclopedia

Medicine (4 matching dictionaries)

24. octogenarian: Merriam-Webster Medical Dictionary
25. Octogenarian: MedTerms.com Medical Dictionary
26. octogenarian: Medical dictionary
27. Octogenarian: Drug Medical Dictionary

Slang (1 matching dictionary)

28. Octogenarian: Urban Dictionary

(Note: See octogenarians as well.)

Definitions from Wiktionary ( ) ▸ noun:  Synonym of eightysomething: a person between 80 and 89 years old. ▸ adjective:  Of or related to eightysomethings. Similar: old, octogenary, octagenarian, septuagenarian, nonagenarian, seventysomething, hexagenarian, sexagenarian, octogenarianism, sixtysomething, more... Phrases: fertile octogenarian, fertile octogenarian rule, more... Adjectives: venerable, old, vigorous, hale, frail, active, healthy, spry, confident, haired, youthful Colors:     silver,     gray,     white,     beige,     lavender, more... ▸ Word origin ▸ Words similar to octogenarian ▸ Usage examples for octogenarian ▸ Idioms related to octogenarian ▸ Wikipedia articles (New!) ▸ Popular adjectives describing octogenarian ▸ Popular nouns described by octogenarian ▸ Words that often appear near octogenarian ▸ Rhymes of octogenarian ▸ Invented words related to octogenarian