undid
ˌən-ˈdid 
ˈən-
; undone
ˌən-ˈdən
ˈən-
; undoing
ˌən-ˈdü-iŋ
ˈən-
; undoes
ˌən-ˈdəz,
ˈən-
1
: to open or loosen by releasing a fastening
undid her jacket
2
: to make of no effect or as if not done : make null : reverse
The damage cannot be undone.
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
He was photographed on Tuesday arriving and departing the Southwark court in a leopard print shirt with several buttons undone and a fedora hat.
—
Lily Ford, HollywoodReporter, 24 Feb. 2026
Given that court decision, there are no votes currently planned in the House on resolutions to undo tariffs on countries such as Mexico and Brazil.
—Rachel Schilke, The Washington Examiner, 24 Feb. 2026
The easiest way to avoid having to undo cosmetic procedures, of course, is not to get them in the first place.
—Marisa Meltzer, Vanity Fair, 23 Feb. 2026
Once there Early got the start in Boston’s do-or-die Game 3 against the New York Yankees in the AL Wild Card Series, and while the Red Sox lost the game, Early pitched well and was ultimately undone by poor infield defense and bad luck.
—Mac Cerullo, Boston Herald, 23 Feb. 2026
See All Example Sentences for undo
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Lily Ford, HollywoodReporter, 24 Feb. 2026
Given that court decision, there are no votes currently planned in the House on resolutions to undo tariffs on countries such as Mexico and Brazil.
—Rachel Schilke, The Washington Examiner, 24 Feb. 2026
The easiest way to avoid having to undo cosmetic procedures, of course, is not to get them in the first place.
—Marisa Meltzer, Vanity Fair, 23 Feb. 2026
Once there Early got the start in Boston’s do-or-die Game 3 against the New York Yankees in the AL Wild Card Series, and while the Red Sox lost the game, Early pitched well and was ultimately undone by poor infield defense and bad luck.
—Mac Cerullo, Boston Herald, 23 Feb. 2026
See All Example Sentences for undo
Cite this Entry
“Undo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undo. Accessed 26 Feb. 2026.
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