fif·​ty | \ ˈfif-tē How to pronounce fifty (audio) \
plural fifties

Definition of fifty

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

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Other Words from fifty

fiftieth \ ˈfif-​tē-​əth How to pronounce fiftieth (audio) \ adjective or noun
fifty adjective
fifty pronoun, plural in construction
fiftyish \ ˈfif-​tē-​ish How to pronounce fiftyish (audio) \ 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 China had almost 49 gigawatts installed as of 2019 and should get into the mid-fifties this year., "China to Dominate Nuclear as Beijing Bets on Homegrown Reactors," 3 June 2020 Now, today’s middle-class workers in their forties and even fifties will likely get stuck with the huge tax increases. Shawn Tully, Fortune, "Who will pay for the coronavirus bailout? If you’re under 50 and working, you will," 20 Apr. 2020 By week’s end, a man in his fifties would succumb to COVID-19 symptoms in Kirkland, a Seattle suburb. Brett Murphy, USA TODAY, "Coronavirus response delayed despite health officials’ private alarm," 7 Apr. 2020 In February, the CDC sent the Army about 10 drops of blood from one of the first Covid-19 patients, a Washington state man in his fifties who was the epidemic’s first US death. Eric Niiler, Wired, "The US Army's Virus Research Lab Gears Up to Fight Covid-19," 1 Apr. 2020 The organizers had hoped, in particular, for Kipchoge to run in ideal weather—temperature in the low fifties in Fahrenheit, with less than eighty per cent humidity. Ed Caesar, The New Yorker, "Eliud Kipchoge Breaks the Two-Hour Barrier in the Marathon," 12 Oct. 2019 The relative increases are four to five times higher than the increases in workforce gains in people in their thirties, forties, and fifties. Isaac Chotiner, The New Yorker, "How Old Is Too Old to Work?," 8 Mar. 2020 Some were influenced by Adelle Davis, Lelord Kordel, or other health food proponents of the fifties. Ellen Fort, Sunset Magazine, "Georgia O’Keeffe’s Collection of Handwritten Recipes Sold to Yale Library," 9 Mar. 2020 But there’s no doubt about it that that over 60 — in some of the cases recently reported out of Washington state, people were in their fifties, but had additional medical conditions — have a very high spike in mortality rates. Matthew Herper, STAT, "Susan Desmond-Hellmann: The coronavirus is alarming. Here’s why you should not panic," 6 Mar. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fifty.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fifty

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

History and Etymology for fifty

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

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Time Traveler for fifty

Time Traveler

The first known use of fifty was before the 12th century

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Statistics for fifty

Last Updated

9 Jun 2020

Cite this Entry

“Fifty.” Dictionary, Merriam-Webster, Accessed 10 Jul. 2020.

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More Definitions for fifty


How to pronounce fifty (audio)

English Language Learners Definition of fifty

: the number 50
: the numbers ranging from 50 to 59
: a set of years ending in digits ranging from 50 to 59


fif·​ty | \ ˈfif-tē How to pronounce fifty (audio) \

Kids Definition of fifty

 (Entry 1 of 2)

: being five times ten



Kids Definition of fifty (Entry 2 of 2)

: five times ten : 50

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More from Merriam-Webster on fifty

Thesaurus: All synonyms and antonyms for fifty

Rhyming Dictionary: Words that rhyme with fifty

Spanish Central: Translation of fifty

Nglish: Translation of fifty for Spanish Speakers

Britannica English: Translation of fifty for Arabic Speakers Encyclopedia article about fifty

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