Dictionary.com
Thesaurus.com

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.


noun

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

  2. the twenty-first member of a series.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"This Government's changes will bring weddings law into the twenty-first century."

From BBC Jul. 24, 2026

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 . . . what if we could fix the fifteenth century? Make everything right again? Then couldn’t Alex and Chip come back to the twenty-first century with us?”

From "Found" by Margaret Peterson Haddix

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training