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definitions

eighty

[ey-tee]
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noun, plural eight·ies.

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.

adjective

amounting to 80 in number.

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Origin of eighty

before 850; Middle English eighteti, Old English eahtatig. See eight, -ty1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eighty

Contemporary Examples of eighty

Historical Examples of eighty

British Dictionary definitions for eighty

eighty

noun plural -ies

the cardinal number that is the product of ten and eightSee 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

determiner

  1. amounting to eightyeighty pages of nonsense
  2. (as pronoun)eighty are expected

Word Origin for eighty

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
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