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Synonyms
Examples of day one in a Sentence
We've known this about the project since Day One.
since day one of this project, we've always insisted that we would create the best product possible without any consideration of cost
Recent Examples on the Web
President-elect Donald Trump has made day one promises that will upend gun violence prevention efforts nationwide.
—Raja Krishnamoorthi, Newsweek, 16 Dec. 2024
Trump has vowed to impose higher tariffs on Mexico, Canada and China on day one of his presidency.
—Elisabeth Buchwald, CNN, 16 Dec. 2024
What does that mean for you on day one of the Trump administration?
—CBS News, 15 Dec. 2024
On day one, Summer won the gold in the 400-meter freestyle, with a world record time of 3:50.25 seconds, lowering the previous record of 3:51.30 set by Li Bingjie of China in 2022.
—Paras J. Haji, Forbes, 13 Dec. 2024
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Word History
First Known Use
1971, in the meaning defined above
Dictionary Entries Near day one
Cite this Entry
“Day one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/day%20one. Accessed 21 Dec. 2024.
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