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
Grail would need to show a reduction in cancer-specific mortality in a properly randomized trial—the elusive gold standard that has undone so many promising screening technologies.
—
Siddhartha Mukherjee, New Yorker, 16 June 2025
This represents an attempt by the Trump administration to undo the OECD Global Tax Deal that established a global minimum corporate tax rate of 15% for large multinational corporations.
—Nick Sargen, Forbes.com, 16 June 2025
Some believed California’s new monuments were at most risk of being targeted, in part because Trump might seek to undo his predecessor’s actions.
—Lila Seidman, Los Angeles Times, 12 June 2025
In short, just one unlocked firearm can undo the protective benefit of securing all other firearms in the home, our results showed.
—Rebeccah Sokol, The Conversation, 10 June 2025
See All Example Sentences for undo
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Siddhartha Mukherjee, New Yorker, 16 June 2025
This represents an attempt by the Trump administration to undo the OECD Global Tax Deal that established a global minimum corporate tax rate of 15% for large multinational corporations.
—Nick Sargen, Forbes.com, 16 June 2025
Some believed California’s new monuments were at most risk of being targeted, in part because Trump might seek to undo his predecessor’s actions.
—Lila Seidman, Los Angeles Times, 12 June 2025
In short, just one unlocked firearm can undo the protective benefit of securing all other firearms in the home, our results showed.
—Rebeccah Sokol, The Conversation, 10 June 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 19 Jun. 2025.
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