twenty-first

American  

[twen-tee-furst, twuhn-] / ˈtwɛn tiˈfɜrst, ˈtwʌn- /

adjective

1. next after the twentieth; being the ordinal number for 21.

2. being one of 21 equal parts.

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noun

1. a twenty-first part, especially of one (1/21).

2. the twenty-first member of a series.

Example Sentences

And so he gives us what he calls “a twenty-first century version of ‘The Conscience of a Conservative.’”

From The Wall Street Journal • Jun. 1, 2026

At half past six on the twenty-first of June 1922, when Count Alexander Ilyich Rostov was escorted through the gates of the Kremlin onto Red Square, it was glorious and cool.

From Los Angeles Times • May 29, 2024

Unimpressed by the books she found in her search for answers, MacPhail, a medical anthropologist, began writing Allergic as a “personal and scientific journey to diagnose the problem of allergy in the twenty-first century.”

From Scientific American • May 31, 2023

What if you told him that, even in his moment, Exxon's scientists already understood with remarkable accuracy what was going to happen to us in the distinctly overheating twenty-first century?

From Salon • Feb. 23, 2023

Beginning about the twenty-first, the top of the world began to glow like an eclipse as the sun circled just below the horizon.

From "Julie of the Wolves" by Jean Craighead George