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
On April 28, Donald Trump took the first steps to undo those decisions.
Since February, Pruitt has filed a proposal of intent to undo or weaken Obama’s climate-change regulations, known as the Clean Power Plan.
Meanwhile, his fellow Republicans were working to undo the program at home. Republican lawmakers want to prevent new, lower-income Ohio adults from enrolling in Medicaid starting July 1, 2018.
This new law seeks to undo the advances made by the ACA and is a step backwards in women’s health care.
Attorney General Jeff Sessions is asking congressional leaders to undo federal medical marijuana protections that have been in place since 2014, according to a May letter that became public Monday.
Undoing most existing U.S. programs that curb car pollution and other climate-changing emissions would probably take years and court battles if Trump tries, climate experts say.
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.
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.
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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