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

Even in her sixties, Moore still had it. —Literary Hub, 28 Oct. 2025

The sixties ushered in a big boom for pancake houses, and this establishment got in on the front end, opening its doors in 1962. —Tara Massouleh McCay, Southern Living, 24 Oct. 2025

That’s why, in the nineteen-sixties, the New Wave became an inspiration to filmmakers worldwide and put movies at the center of cultural life. —Hilton Als, New Yorker, 24 Oct. 2025

In a new study, walking as little as 4,000 steps one or two days a week was linked to a significantly lower risk of heart disease and early death for women in their sixties and older. —Tom Gavin, EverydayHealth.com, 24 Oct. 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