Definition of undo
undidplay \ˌən-ˈdid, ˈən-\;
undoneplay \ˌən-ˈdən, ˈən-\;
undoingplay \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
: to come open or apart
undoerplay \ˌən-ˈdü-ər, ˈən-\ noun
Examples of undo in a Sentence
You can't undo the past.
The damage cannot be undone.
He was undone by greed.
Recent Examples of undo from the Web
Unfriending: President Trump is facing pressure to follow through on his campaign promise to undo the deal former President Obama made to reset relations with Cuba.
President Trump announced Thursday the U.S. will withdraw from the landmark Paris accord, undoing decades of painstaking negotiations that brought almost 200 countries together in a fight against climate change.
Pontus Aberg scored the lone goal for the Predators, who were once again undone by a sudden barrage from the NHL's highest-scoring team.
Pontus Aberg scored the lone goal for the Predators, who were once again undone by a sudden barrage from the NHL’s highest-scoring team.
TOKYO—Toshiba Corp. is undoing a spinoff of its joint venture with Western Digital Corp. in its latest bid to accelerate the sale of the Japanese technology giant’s flash memory chip unit and survive.
Perhaps an even more significant divergence is that the fictional businessman is soon undone by his own cowardice, with no action by the bohemians or aristocrats required.
The Spurs, yet again, had adapted directly to what had undone their previous efforts.
The Supreme Court sided with Cacheris, ruling that Congress could not undo Miranda.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undo'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Before 12th Century
First Known Use of undo
before 12th century
UNDO Defined for English Language Learners
Definition of undo for English Language Learners
: to open or release (something) : to unfasten or loosen (something)
: to change or stop the effect of (something)
: to cause the failure of (someone or something)
UNDO Defined for Kids
Definition of undo for Students
Seen and Heard
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