We found 28 dictionaries that define the word eighty:

General (24 matching dictionaries)

1. eighty: Merriam-Webster
2. eighty: Oxford Learner's Dictionaries
3. eighty: American Heritage Dictionary of the English Language
4. eighty: Collins English Dictionary
5. eighty: Vocabulary.com
6. Eighty, eighty: Wordnik
7. eighty: Cambridge Advanced Learner's Dictionary
8. eighty: Wiktionary
9. eighty: Webster's New World College Dictionary, 4th Ed.
10. eighty: The Wordsmyth English Dictionary-Thesaurus
11. eighty: Infoplease Dictionary
12. Eighty, eighty: Dictionary.com
13. eighty: Cambridge Essential American English Dictionary
14. Eighty: Online Plain Text English Dictionary
15. eighty: Webster's Revised Unabridged, 1913 Edition
16. eighty: Rhymezone
17. eighty: AllWords.com Multi-Lingual Dictionary
18. eighty: Webster's 1828 Dictionary
19. eighty: FreeDictionary.org
20. eighty: Mnemonic Dictionary
21. eighty: TheFreeDictionary.com
22. eighty: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

23. eighty: Encyclopedia

Miscellaneous (1 matching dictionary)

24. eighty: Idioms

Science (1 matching dictionary)

25. eighty: MATH SPOKEN HERE!

Slang (1 matching dictionary)

26. Eighty: Urban Dictionary

(Note: See 80 as well.)

Definitions from WordNet ( ) ▸ noun:  the cardinal number that is the product of ten and eight ▸ adjective:  being ten more than seventy Opposite: twenty, young, few, beginning, start Types: octogenarian, eighty-year-old, more... Phrases: eighty five, eighty four, eighty seven, eighty eight, eighty six, more... Adjectives: nineteen, ten, fifth, six, hundred, old Colors:     beige,     taupe,     mauve,     dusty rose,     olive, more... ▸ Words similar to eighty ▸ Usage examples for eighty ▸ Idioms related to eighty ▸ Wikipedia articles (New!) ▸ Popular adjectives describing eighty ▸ Popular nouns described by eighty ▸ Words that often appear near eighty ▸ Rhymes of eighty ▸ Invented words related to eighty