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
No amount of procrastination can undo the fact that language forces a decision about who is speaking, who is addressed, and who is being spoken about.
—
Erika Landström, Artforum, 2 June 2026
The restrictions, published Monday, come weeks after China made Meta undo its purchase of Chinese AI startup Manus.
—J.d. Capelouto, semafor.com, 2 June 2026
The boy treating her to ice cream is Michael Skakel, 15, who, 27 years later, will be convicted of her murder, and 11 years after that will have the conviction undone on appeal.
—Kate Casey, Vanity Fair, 2 June 2026
Whatever pleasure could be had in Nate’s comeuppance was undone by his humiliation dragging out for hours before being put out of his misery; Cassie’s next act as a hype-house doyenne is only handwaved at, and any responsibility for Nate’s unpaid debts handwaved entirely.
—Alison Herman, Variety, 1 June 2026
See All Example Sentences for undo
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Erika Landström, Artforum, 2 June 2026
The restrictions, published Monday, come weeks after China made Meta undo its purchase of Chinese AI startup Manus.
—J.d. Capelouto, semafor.com, 2 June 2026
The boy treating her to ice cream is Michael Skakel, 15, who, 27 years later, will be convicted of her murder, and 11 years after that will have the conviction undone on appeal.
—Kate Casey, Vanity Fair, 2 June 2026
Whatever pleasure could be had in Nate’s comeuppance was undone by his humiliation dragging out for hours before being put out of his misery; Cassie’s next act as a hype-house doyenne is only handwaved at, and any responsibility for Nate’s unpaid debts handwaved entirely.
—Alison Herman, Variety, 1 June 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 5 Jun. 2026.
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