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

Morning lows both Saturday and Sunday should tick down to the mid-30s, with afternoon highs hitting the mid-60s on Saturday and upper sixties on Sunday. — Ron Smiley, CBS News, 22 Oct. 2026

In the mid-nineteen-sixties, the sociologist James Coleman led a survey of public-school students and teachers, under the auspices of the Civil Rights Act, on the topic of equal educational opportunity. — Jessica Winter, New Yorker, 22 Oct. 2026

The price held in the sixties for six weeks, the report said. — Garrett Downs, CNBC, 9 Sep. 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