Definition of eighty in English:

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Pronunciation: /ˈeɪti/

cardinal number (plural eighties)

1Equivalent to the product of eight and ten; ten less than ninety; 80: eighty miles north a buffet for eighty eighty of the nurses fled (Roman numeral: lxxx or LXXX)
More example sentences
  • By the eve of the Revolution, eighty to ninety percent of rural households owned spinning wheels, and almost half owned looms.
  • I think it's about eighty or ninety years old at most, but it has an extremely unusual quality.
  • I read somewhere that a child, whose parents both smoke twenty a day, has inhaled the equivalent of eighty cigarettes worth of passive smoke in one year.
1.1 (eighties) The numbers from 80 to 89, especially the years of a century or of a person’s life: his grandmother was in her eighties
More example sentences
  • During the eighties he found himself seconded to the new ambulance control room, in Preston.
  • It was in the eighties that underworld characters in the movies began to look more realistic.
  • There had been a change in the nature of unemployment since the early eighties.
1.2Eighty years old: he was over eighty at the time
More example sentences
  • Cartoon Art Classes take place every Saturday from 10 to 11.30 a.m. for ages eight to eighty.
  • I found that he had died in 1988 at the age of eighty.
  • He passed away in 1996, near the age of eighty, but was a strong, feisty man.
1.3Eighty miles an hour: roaring down the highway doing eighty
More example sentences
  • When we got in the jeep he sped about eighty down the highway.
  • You should've seen her last night, driving at seventy miles per hour going on eighty, blasting rock music.
  • He pushed the speed up to eighty on a forty mile road.



Pronunciation: /ˈeɪtɪəθ/
ordinal number
Example sentences
  • The thought of having to listen for eightieth time to some youngster reciting ‘I wandered lonely as a cloud’ and still having to retain some benign encouraging smile seems to me to be beyond the call of duty.
  • The New Yorker celebrates its eightieth anniversary with a travelling exhibition of memorable cartoons inked by notable cartoonists from the past eight decades.
  • Well, here we are, 2003 already, and next birthday will be my eightieth.


adjective& adverb
Example sentences
  • An eightyfold increase in coal production led to the need for more lumber for mine props, timbers, and planks.
  • In 2003, imports from China were worth $3.3 billion, an eightyfold rise over 1992.


Old English hunde(a)htatig, from hund (of uncertain origin) + e(a)hta 'eight' + -tig (see -ty2); the first element was lost early in the Middle English period.

Words that rhyme with eighty

Albacete, Haiti, Katy, Kuwaiti, Leyte, matey, pratie, slaty, weighty

For editors and proofreaders

Line breaks: eighty

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