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

Satellites, the space race, men on the Moon, and all the sci-fi and commercial kitsch that went with it was part of growing up in the sixties. — Literary Hub, 15 July 2026

The firm founded by the prolific New York City architect Emery Roth built the tower—technically two adjoining buildings—in the nineteen-sixties. — D. T. Max, New Yorker, 11 July 2026

The landmark property celebrates the style of the sixties, when air travel still had a spark of glamor. — Allison Tibaldi, USA Today, 4 July 2026

For most people in their sixties and seventies, all of those accounts are open. — Kurt Knutsson, FOXNews.com, 11 June 2026

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