a cardinal number, ten times eight.
a symbol for this number, as 80 or LXXX.
a set of this many persons or things.
eighties, the numbers, years, degrees, or the like, from 80 through 89, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature.
amounting to 80 in number.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use eighty in a sentence
The archaeologist Sarah Nelson is in her eighties, and she would go dig in China this minute if she could get grant money.
The images tend to be followed by an equally non-contextual eighties reference and nothing more is said.
Its eighties music is so cheesy and the struggle is so real.
The novel might be a metafiction in the style of John Barth, who has also in his eighties been influenced by cognitive science.
Back in the eighties, no one knew about a hot glue gun except display people.
By the late Eighties he had disappeared into the north, and the careless city knew him no more.Ancestors | Gertrude Atherton
In the late eighties he returned to his native island, settled at Peel, and became a magnate there.Fifty Years of Railway Life in England, Scotland and Ireland | Joseph Tatlow
In the eighties any writer who dealt unabashed with death was regarded as an unpleasant person.The Letters of Ambrose Bierce | Ambrose Bierce
It broke down the strength of Mr. Gladstone's Government in the eighties.Home Rule | Harold Spender
The period of laissez faire in imperial matters, of Little Englandism, drew to a close in the early eighties.The Canadian Dominion | Oscar D. Skelton
British Dictionary definitions for eighty
the cardinal number that is the product of ten and eight: See also number (def. 1)
a numeral, 80, LXXX, etc, representing this number
(plural) the numbers 80–89, esp a person's age or the year of a particular century
the amount or quantity that is eight times as big as ten
something represented by, representing, or consisting of 80 units
amounting to eighty: eighty pages of nonsense
(as pronoun): eighty are expected
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012