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

Cracks appeared in the sixties, Dunkelman thinks, as liberalism started to reflect the baby boomers’ distrust of the establishment. —Benjamin Wallace-Wells, The New Yorker, 3 Mar. 2025

In response to the endless, frightening sixties business of assassination, imperial war, and the money drive, Warhol films offered up nice naps. —Carlos Valladares, ARTnews.com, 14 Feb. 2025

The Civil Rights movement was certainly there before Lyndon Johnson, and the sixties also had the women’s movement and the gay rights movement. —Mike Fleming Jr, Deadline, 14 Feb. 2025

Scout Motors, the classic off-road brand from the sixties, has been reborn as an electric vehicle company and is building a new SUV and pickup truck. —Verge Staff, The Verge, 5 Feb. 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