setback
Americannoun
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a check to progress; a reverse or defeat.
The new law was a setback.
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Architecture. a recession of the upper part of a building from the building line, as to lighten the structure or to permit a desired amount of light and air to reach ground level at the foot of the building.
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an act or instance of setting back.
A nightly setback of your home thermostats can save a great deal of fuel.
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Also a downward temperature adjustment of a thermostat, especially performed automatically, as by a timer.
Etymology
Origin of setback
First recorded in 1665–75; noun use of verb phrase set back
Explanation
A setback is an event that makes you lose progress or keeps you from gaining ground. If you're knitting a sweater, dropping a bunch of stitches would be a big setback. If warring countries are negotiating a treaty, a sudden resurgence of fighting would be a huge setback for their peace plan. And if you're trying to finish baking in time for you friend's birthday party, knocking the frosted cake onto the floor would also be a setback. Setbacks are always frustrating — unless you're talking about the kind of setback that's defined as "a building's distance from the street."
Vocabulary lists containing setback
Vocabulary from Hillary Clinton's Concession Speech, November 9, 2016
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Heat
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This Week in Words: Current Events Vocab for September 10–September 16, 2022
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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.
For the first time in 16 years, credible polls suggest he faces a serious electoral setback this Sunday.
From The Wall Street Journal • Apr. 10, 2026
And despite the early setback, Bury won 3-2 and went on to avoid relegation.
From BBC • Apr. 10, 2026
Watkins' response to the setback has been nothing short of emphatic, with the 30-year-old adding to the goal he scored against West Ham in the Premier League just before the international break.
From BBC • Apr. 9, 2026
For the ballroom to suffer a setback in federal court, then, is for the whole world to be in sudden danger.
From Slate • Apr. 4, 2026
I had worked so hard on my education, and this felt like a setback.
From "How Dare the Sun Rise" by Sandra Uwiringiyimana
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.
