undid
ˌən-ˈdid 
ˈən-
; undone
ˌən-ˈdən
ˈən-
; undoing
ˌən-ˈdü-iŋ
ˈən-
1
: to open or loose by releasing a fastening
2
: to make of no effect or as if not done : make null : reverse
3
a
: to ruin the worldly means, reputation, or hopes of
a politician undone by scandal
b
: to disturb the composure of : upset
she's come undone
c
: to come open or apart
Examples of undo in a Sentence
You can't undo the past.
The damage cannot be undone.
He was undone by greed.
Recent Examples on the Web
Those fixes, such as fine-tuning a model’s responses to avoid dangerous outputs, can work in the short term but are easier to undo and can sometimes weaken the model in unintended ways.
—
Sharon Goldman, Fortune, 14 Aug. 2025
Brandon Bell/Getty Brian Albrecht, chief economist at the International Center for Law and Economics, added that even small distortions could be difficult to undo.
—Jesus Mesa, MSNBC Newsweek, 14 Aug. 2025
There was sympathetic ovation from Leicester fans once the protest ended after five minutes and stoic defending was eventually undone by second-half goals from Leicester defenders Jannik Vestergaard and Wout Faes.
—Philip Buckingham, New York Times, 11 Aug. 2025
After spending months cutting funds to researchers, many grants-management specialists then had to undo that work in a matter of days, after a federal judge ordered the agency to immediately reinstate hundreds of grants.
—Katherine J. Wu, The Atlantic, 6 Aug. 2025
See All Example Sentences for undo
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Sharon Goldman, Fortune, 14 Aug. 2025
Brandon Bell/Getty Brian Albrecht, chief economist at the International Center for Law and Economics, added that even small distortions could be difficult to undo.
—Jesus Mesa, MSNBC Newsweek, 14 Aug. 2025
There was sympathetic ovation from Leicester fans once the protest ended after five minutes and stoic defending was eventually undone by second-half goals from Leicester defenders Jannik Vestergaard and Wout Faes.
—Philip Buckingham, New York Times, 11 Aug. 2025
After spending months cutting funds to researchers, many grants-management specialists then had to undo that work in a matter of days, after a federal judge ordered the agency to immediately reinstate hundreds of grants.
—Katherine J. Wu, The Atlantic, 6 Aug. 2025
See All Example Sentences for undo
Cite this Entry
“Undo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undo. Accessed 21 Aug. 2025.
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