noun, plural six·ties.
a cardinal number, ten times six.
a symbol for this number, as 60 or LX.
a set of this many persons or things.
sixties, the numbers, years, degrees, or the like, from 60 through 69, as in referring to numbered streets, indicating the years of a lifetime or of a century, or noting degrees of temperature: Her grandfather is in his late sixties. The temperature is in the low sixties.
amounting to 60 in number.
like sixty, Informal. with great speed, ease, energy, or zest: Everyone was working like sixty to finish up before the holidays.
Origin of sixty
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -ties
- amounting to sixtysixty soldiers
- (as pronoun)sixty are dead
Word Origin for sixty
Old English sixtig
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
Online Etymology Dictionary, © 2010 Douglas Harper