mustn't
AmericanUsage
See contraction.
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.
“Anticorruption efforts mustn’t be exploited, and the chaotic practice of ‘hyping up corruption’ must be curbed,” the official party newspaper of Sichuan province said in a commentary.
From The Wall Street Journal ● Aug. 10, 2026
But "we mustn't give in to this siren song," warned Bernard Jullien, an automotive industry specialist at the University of Bordeaux.
From Barron's ● May 8, 2026
"We mustn't end up like Iraq or Syria, honestly, we don't deserve that," a young man in Tehran said, referring to the civil wars which scarred those two countries this century.
From BBC ● Mar. 6, 2026
One is: We mustn’t ever get into a world where it’s got to be a genocide before we care about it.
From Slate ● Nov. 20, 2025
This outside world is full of people I mustn't trust.
From "Born Behind Bars" by Padma Venkatraman
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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.