eighty
noun
ˈā-tē 
plural eighties
1
: a number that is equal to eight times 10 see Table of Numbers
2
eighties plural : the numbers 80 to 89
specifically : the years 80 to 89 in a lifetime or century
eightieth
ˈā-tē-əth
adjective or noun eighty adjective
eighty pronoun, plural in construction
Example Sentences
The temperature rose to the high eighties. She is in her mid-eighties.
Recent Examples on the Web But, travelling the country, I routinely am picked up by people in their seventies and sometimes eighties doing their next jobs. 
Isaac Chotiner, The New Yorker, 8 Mar. 2020 One of those, an Anchor Point man reported to be in his eighties, was tested only after being admitted to the hospital for other serious health problems. Tom Kizzia, Anchorage Daily News, 11 May 2020 The two writers are tied together in my mind (Berry, now in his eighties, was a student of Stegner, who died in 1993) and have become a touchstone in difficult times. Heather Hansman, Outside Online, 12 Apr. 2020 The glamorous eighties modernism of Trump Tower in Manhattan is transformed by the equally glamorous neoclassical mode favored in Las Vegas. Bruce Handy, The New Yorker, 24 Feb. 2020 Tucked away in his archive were more than two thousand rolls of film from the nineteen-seventies and eighties, which had for some reason slipped through the cracks. Chris Wiley, The New Yorker, 11 Nov. 2019 Amazonia hits the eighties every day, too warm and humid to feel comfortable suited up for wetland birding in long pants and rubber boots. Nell Zink, Harper's magazine, 28 Oct. 2019 For 2018/19, New Balance set out to recreate the popular (if ugly) 2008/09 away kit, which itself was an attempt to recreate the popular (but attractive) away kits of the late eighties. SI.com, 29 Sep. 2019 Marie also enjoyed ballroom and line dancing with other seniors at the West Hartford Senior Center and walked several miles each day until her late eighties at West Farms Mall. courant.com, 14 Nov. 2019 See More
Isaac Chotiner, The New Yorker, 8 Mar. 2020 One of those, an Anchor Point man reported to be in his eighties, was tested only after being admitted to the hospital for other serious health problems. Tom Kizzia, Anchorage Daily News, 11 May 2020 The two writers are tied together in my mind (Berry, now in his eighties, was a student of Stegner, who died in 1993) and have become a touchstone in difficult times. Heather Hansman, Outside Online, 12 Apr. 2020 The glamorous eighties modernism of Trump Tower in Manhattan is transformed by the equally glamorous neoclassical mode favored in Las Vegas. Bruce Handy, The New Yorker, 24 Feb. 2020 Tucked away in his archive were more than two thousand rolls of film from the nineteen-seventies and eighties, which had for some reason slipped through the cracks. Chris Wiley, The New Yorker, 11 Nov. 2019 Amazonia hits the eighties every day, too warm and humid to feel comfortable suited up for wetland birding in long pants and rubber boots. Nell Zink, Harper's magazine, 28 Oct. 2019 For 2018/19, New Balance set out to recreate the popular (if ugly) 2008/09 away kit, which itself was an attempt to recreate the popular (but attractive) away kits of the late eighties. SI.com, 29 Sep. 2019 Marie also enjoyed ballroom and line dancing with other seniors at the West Hartford Senior Center and walked several miles each day until her late eighties at West Farms Mall. courant.com, 14 Nov. 2019 See More Word History
Etymology
Middle English eighty, adjective, from Old English eahtatig, short for hundeahtatig, noun, group of eighty, from hund-, literally, hundred + eahta eight + -tig group of ten; akin to Old English tīen ten
First Known Use
before the 12th century, in the meaning defined at sense 1
Phrases Containing eighty
Kids Definition
eighty 1 of 2
adjective
ˈā-tē
: eight times ten : 80
eighty
2 of 2noun
: being eight times ten