fifty

American  

[fif-tee] / ˈfɪf ti /

noun

• fifties
  plural

1. a cardinal number, ten times five.

2. a symbol for this number, as 50 or L.

3. a set of this many persons or things.

4. fifties, the numbers, years, degrees, or the like, from 50 through 59, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature.

   She lives in the East Fifties. He's in his late fifties. It's going to be in the fifties again today.

5. Informal. a fifty-dollar bill.

   He had a fifty and two tens in his wallet.

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adjective

1. amounting to 50 in number.

fifty British  

/ ˈfɪftɪ /

noun

1. the cardinal number that is the product of ten and five

2. a numeral, 50, L, etc, representing this number

3. something represented by, representing, or consisting of 50 units

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determiner

1. 1. amounting to fifty

      fifty people

   2. ( as pronoun )

      fifty should be sufficient

Other Word Forms

Noun Inflected Forms

• fifties
  plural

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Etymology

Origin of fifty

before 900; Middle English; Old English fīftig. See five, -ty ¹

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Example Sentences

See Examples For:

fifty fifties

Two hundred fifty years on, the principles of our country’s founding are still woven into the fabric of U.S. society.

From The Wall Street Journal ● Sep. 1, 2026

Abdullah Shafique: The only Pakistan batter to reach fifty or emerge with any crumb of credit after 61 in the first innings.

From BBC ● Aug. 21, 2026

To investigate this connection, the team studied a large multicenter group consisting of fifty patients and one hundred brain hemispheres.

From Science Daily ● Aug. 12, 2026

Around fifty miners have already taken part, and all of them have received job offers.

From Barron's ● Jul. 17, 2026

But in this new normal, fifty dollars a day could really help our family.

From "South of Somewhere" by Kalena Miller

The man was in his fifties when he was diagnosed with mild cognitive impairment caused by Alzheimer's disease.

From Science Daily ● Oct. 15, 2026

Khaled Al-Badri, a Kuwaiti man in his fifties, told AFP he started turning off the air conditioning before leaving his house and switching off the outdoor lights.

From Barron's ● Jul. 21, 2026

Nedoune, a Tuareg herder in his fifties, said he was fetching water two years ago in the northern Timbuktu region when a convoy spotted him.

From Barron's ● May 19, 2026

A mum-of-three in her fifties, who spoke to the BBC on condition of anonymity, said she had studied for her degree at a franchised college in London.

From BBC ● Apr. 10, 2026

They were short, stocky men in their fifties.

From "Atonement" by Ian McEwan

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