twenty-first
Americanadjective
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next after the twentieth; being the ordinal number for 21.
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being one of 21 equal parts.
noun
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a twenty-first part, especially of one (1/21).
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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.
"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
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.