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
The walk was undone by the reversal of the pitch call, but Shelton thought the challenge was issued too late and shouldn’t have been allowed (elsewhere an umpire decided the Braves’ Matt Olson was actually guilty of a too-slow head tap and refused to send a strike against him to review).
—
Hannah Keyser, CNN Money, 31 Mar. 2026
And per The Conversation, if the shower is followed by full bright lighting for blow-drying or getting ready, the benefit is largely undone.
—Allison Palmer, Charlotte Observer, 31 Mar. 2026
But legislation in Jefferson City could undo that, raising more questions about how many people could be kicked off the government coverage.
—Suzanne King, Kansas City Star, 31 Mar. 2026
Present Nick is selfish and angry, while Future Nick has realized the error of his ways, hence his desire to undo his previous actions.
—Brian Davids, HollywoodReporter, 30 Mar. 2026
See All Example Sentences for undo
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Hannah Keyser, CNN Money, 31 Mar. 2026
And per The Conversation, if the shower is followed by full bright lighting for blow-drying or getting ready, the benefit is largely undone.
—Allison Palmer, Charlotte Observer, 31 Mar. 2026
But legislation in Jefferson City could undo that, raising more questions about how many people could be kicked off the government coverage.
—Suzanne King, Kansas City Star, 31 Mar. 2026
Present Nick is selfish and angry, while Future Nick has realized the error of his ways, hence his desire to undo his previous actions.
—Brian Davids, HollywoodReporter, 30 Mar. 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 3 Apr. 2026.
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