eighty

American  

[ey-tee] / ˈeɪ ti /

noun

plural

eighties

1. a cardinal number, ten times eight.

2. a symbol for this number, as 80 or LXXX.

3. a set of this many persons or things.

4. eighties, the numbers, years, degrees, or the like, from 80 through 89, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature.

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adjective

1. amounting to 80 in number.

eighty British  

/ ˈeɪtɪ /

noun

1. the cardinal number that is the product of ten and eight See also number

2. a numeral, 80, LXXX, etc, representing this number

3. (plural) the numbers 80–89, esp a person's age or the year of a particular century

4. the amount or quantity that is eight times as big as ten

5. something represented by, representing, or consisting of 80 units

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determiner

1. 1. amounting to eighty

      eighty pages of nonsense

   2. ( as pronoun )

      eighty are expected

Usage

Spelling tips for 80 The word eighty (80) is hard to spell for two reasons. First, it is not spelled the way it sounds [ ey-tee ]. Second, it is tempting to use a double t because the base word (eight) ends in a t and the suffix -ty begins with one.  How to spell eighty: To spell eighty, you start by correctly spelling the first syllable [ ey ]. The easiest way to remember how to spell eigh- is with the classic mnemonic device: “I before E, except after C, except when it’s pronounced like a long A, as in neighbor and weigh.” The collection of letters eigh often makes a long A sound [ ey ].

Etymology

Origin of eighty

before 850; Middle English eighteti, Old English eahtatig. See eight, -ty ¹

Example Sentences

“A dollar, maybe eighty cents. Just the Italian beef jus poured over bread.”

From Salon • Dec. 7, 2025

Seventy-five percent to eighty percent of clients reportedly want to use Snowflake to centralize and prepare corporate data for AI, according to an industry contact.

From Barron's • Oct. 23, 2025

A survey published last year estimated that Australians worked on average two hundred and eighty one hours of unpaid overtime annually.

From BBC • Aug. 25, 2024

The ‘crypto’ nomenclature may be of recent vintage, but the challenged transactions fall comfortably within the framework that courts have used to identify securities for nearly eighty years.

From Los Angeles Times • Apr. 10, 2024

James Garfield was dead, eighty days after Charles Guiteau's bullet pierced his back.

From "Ambushed!" by Gail Jarrow