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eighty

[ey-tee] /ˈeɪ ti/
noun, plural eighties.
1.
a cardinal number, ten times eight.
2.
a symbol for this number, as 80 or LXXX.
3.
a set of this many persons or things.
4.
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.
adjective
5.
amounting to 80 in number.
Origin
850
before 850; Middle English eighteti, Old English eahtatig. See eight, -ty1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for eighty
  • eighty percent of the lava was produced during a single pulse of eruptions, she added.
  • eighty-seven percent of the peninsula's glaciers have been retreating during the same period, he added.
  • eighty-six adult pandas have also been confirmed safe.
  • See tractors and other farm equipment spanning the last eighty years.
  • The injunction may forestall calamity by keeping the wheels of industry turning for an additional eighty days.
  • Since then the county has seen an average of eighty-one cases a year.
  • eighty patients with irritable bowel syndrome were instructed to take two sugar pills daily.
  • eighty-two percent of the animal's genes are found in other mammals.
  • eighty percent of the dingoes there are hybrids, and pure dingoes exist in only two remote, mountainous areas.
  • Saving that six million cost thousands of lives and eighty billion.
British Dictionary definitions for eighty

eighty

/ˈeɪtɪ/
noun (pl) -ies
1.
the cardinal number that is the product of ten and eight See also number (sense 1)
2.
a numeral, 80, LXXX, etc, representing this number
3.
(pl) the numbers 80–89, esp a person's age or the year of a particular century
4.
the amount or quantity that is eight times as big as ten
5.
something represented by, representing, or consisting of 80 units
determiner
6.
  1. amounting to eighty: eighty pages of nonsense
  2. (as pronoun): eighty are expected
Word Origin
Old English eahtatig; related to Old Frisian achtig, Old High German ahtozug
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
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Word Origin and History for eighty
n.

eigteti (late 13c.), from eight + -ty (1). Replacing Old English hundeahtatig, with hund- "ten." Related: Eightieth.

Online Etymology Dictionary, © 2010 Douglas Harper
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13
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