fifty

noun

fif·​ty ˈfif-tē 

plural fifties

1

: a number equal to five times 10 see Table of Numbers

2

fifties plural : the numbers 50 to 59

specifically : the years 50 to 59 in a lifetime or century

3

: a 50-dollar bill

fiftieth

ˈfif-tē-əth 

adjective or noun

fifty adjective

fifty pronoun, plural in construction

fiftyish

ˈfif-tē-ish 

adjective

Examples of fifty in a Sentence

She is in her fifties.

The bill for dinner came to $43, and she gave him a fifty.

Recent Examples on the Web

Meanwhile, the share of people getting married for the first time in their forties and fifties quadrupled between 1990 and 2019. —Alicia Adamczyk, Fortune, 18 Oct. 2024

Women leaders who were so focused on building their careers in large companies now, in their fifties, sixties, and seventies, have the opportunity to be mentors. —Eleanor Pringle, Fortune Asia, 7 Oct. 2024

Both are in their fifties and both live with disabilities. —Gus Alexiou, Forbes, 30 Sep. 2024

The screening is recommended every one or two years for women starting in their forties or fifties, depending on individual preference and risk factors, according to the Susan G. Komen Foundation. —Becky Upham, EverydayHealth.com, 11 Sep. 2024

Word History

Etymology

Middle English, from fifty, adjective, from Old English fīftig, from fīftig, noun, group of 50, from fīf five + -tig group of ten; akin to tīen ten

First Known Use

before the 12th century, in the meaning defined at sense 1

Phrases Containing fifty

• fifty-fifty

Kids Definition

fifty

noun

fif·​ty ˈfif-tē 

plural fifties

: a number equal to five times 10 see number

fiftieth

-tē-əth 

adjective or noun

fifty adjective or pronoun