sixty

noun

six·​ty ˈsiks-tē 

plural sixties

1

: a number that is equal to six times 10 see Table of Numbers

2

sixties plural : the numbers 60 to 69

specifically : the years 60 to 69 in a lifetime or century

sixtieth

ˈsiks-tē-əth 

adjective or noun

sixty adjective

sixty pronoun, plural in construction

sixtyish

ˈsiks-tē-ish 

adjective

Examples of sixty in a Sentence

He retired when he was in his sixties.

Recent Examples on the Web

Horror fans are especially familiar with this effect—the P.O.V. shot became a staple of the genre under the influence of Italian giallo films of the sixties and seventies. —Lauren Michele Jackson, New Yorker, 7 June 2025

For example, when a man in his sixties talks about the same thing, he’s seen as calm and logical, but when a woman in her twenties talks about it, she’s seen as arrogant or trying to act mature. —Billboard Japan, Billboard, 15 May 2025

Land Rover used this name in the sixties to hide the identity of 26 concept vehicles before applying it to a production car in 2017—the Range Rover Velar. —Matthew MacConnell, Forbes.com, 21 May 2025

All of a sudden, a sixties convertible came screeching up, blaring Doors Music at top volume. —Andreas Wiseman, Deadline, 2 Apr. 2025

Word History

Etymology

Middle English, from sixty, adjective, from Old English siextig, noun, group of sixty, from siex six + -tig group of ten; akin to Old English tīen ten

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing sixty

• sixty-fourth note
• sixty-fourth rest
• sixty-nine

Kids Definition

sixty

noun

six·​ty ˈsik-stē 

plural sixties

: a number that is equal to six times 10 see number

sixtieth

-stē-əth 

adjective or noun

sixty adjective or pronoun