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

Over-all staffing has hit its lowest point since the late nineteen-sixties, when the system served approximately fifty million fewer beneficiaries. —E. Tammy Kim, New Yorker, 7 May 2026

Instead, her sugar daddy, a finance guy in his late sixties, suggested a slow-growing, low-risk investment account with Charles Schwab that would be a safer bet than Wall Street. —Jason Parham, Wired News, 3 Apr. 2026

Back in the sixties, the ramshackle War on Poverty left a memory of futility. —Literary Hub, 23 Mar. 2026

Standing at 322 feet, Artemis is short by just 43 feet the height of the Saturn V rockets that brought humans to the moon in the late sixties and early seventies. —Jim Clash, Forbes.com, 20 Mar. 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