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.
"I thought it was wrong… I'd said we mustn't pay it, but we ended up paying it anyway," he told the BBC, about a claim that followed a visit by Andrew to the Middle East.
From BBC • Feb. 23, 2026
I’m sad that I mustn’t climb tall ladders anymore, per an agreement with Karen.
From The Wall Street Journal • Dec. 4, 2025
But Oedipus’ strengths — the keenness of his mind, his heroic commitment to truth and transparency — mustn’t be overlooked.
From Los Angeles Times • Nov. 13, 2025
"You know, 'it mustn't happen again. We cannot inflict this on our children'. There was astonishment, a shock realisation that the war had been so much more horrible than anyone had imagined it could be."
From BBC • Nov. 10, 2025
You mustn’t get the idea that he’s starving.
From "The Diary of a Young Girl" by Anne Frank
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.
