twentieth

American  

[twen-tee-ith, twuhn-] / ˈtwɛn ti ɪθ, ˈtwʌn- /

adjective

1. next after the nineteenth; being the ordinal number for 20.

2. being one of 20 equal parts.

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noun

1. a twentieth part, especially of one (1/20).

2. the twentieth member of a series.

ˈtwentieth British  

/ ˈtwɛntɪɪθ /

adjective

1. (usually prenominal)

   1. coming after the nineteenth in numbering or counting order, position, time, etc; being the ordinal number of twenty: often written 20th

   2. ( as noun )

      he left on the twentieth

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noun

1. 1. one of 20 approximately equal parts of something

   2. ( as modifier )

      a twentieth part

2. the fraction that is equal to one divided by 20 ( 1/ 20 )

Etymology

Origin of twentieth

before 900; Middle English twentithe, Old English twentigotha. See twenty, -eth ²

Example Sentences

“It’s no more dangerous than the twentieth century,” she argues.

From The Wall Street Journal • Feb. 17, 2026

The authors attribute this rapid progress to close collaboration among universities, government agencies, and industry, the same mix of partnerships that helped microelectronics mature in the twentieth century.

From Science Daily • Jan. 27, 2026

Television defined the last half of the twentieth century, outperforming all other mass media combined.

From Los Angeles Times • Jan. 22, 2026

For one thing, recessions are no longer anywhere near as frequent as they used to be in the first half, indeed for most of the twentieth century.

From MarketWatch • Nov. 4, 2025

The divorce took place in 1992, just a couple years shy of their twentieth wedding anniversary.

From "Americanized" by Sara Saedi