one day
idiom
1
: at some time in the future
One day, it'll happen. You'll see.
People may one day be able to take vacations to the moon.
2
: on a day in the past
I went to her house one day and had lunch with her.
One day, we had a terrible argument.
Examples of one day in a Sentence
Recent Examples on the Web
Cosby pleaded guilty one day after his wife filed for divorce, People reported.
—
Marlene Lenthang, NBC news, 5 Dec. 2025
The timeline aligns with the NFL schedule, as the Chicago Bears are set to host the Cleveland Browns at Soldier Field on Sunday, December 14, just one day after Cena’s final bout.
—Andrew Ravens, MSNBC Newsweek, 4 Dec. 2025
The eighth grader was not allowed to race despite dreaming of one day turning pro.
—Nick Penzenstadler, USA Today, 4 Dec. 2025
The outburst came one day after the Department of Homeland Security announced Operation Catahoula Crunch, a two-month federal initiative deploying 250 Border Patrol agents to New Orleans and surrounding areas.
—Stepheny Price , Sarah Alegre, FOXNews.com, 4 Dec. 2025
See All Example Sentences for one day
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Marlene Lenthang, NBC news, 5 Dec. 2025
The timeline aligns with the NFL schedule, as the Chicago Bears are set to host the Cleveland Browns at Soldier Field on Sunday, December 14, just one day after Cena’s final bout.
—Andrew Ravens, MSNBC Newsweek, 4 Dec. 2025
The eighth grader was not allowed to race despite dreaming of one day turning pro.
—Nick Penzenstadler, USA Today, 4 Dec. 2025
The outburst came one day after the Department of Homeland Security announced Operation Catahoula Crunch, a two-month federal initiative deploying 250 Border Patrol agents to New Orleans and surrounding areas.
—Stepheny Price , Sarah Alegre, FOXNews.com, 4 Dec. 2025
See All Example Sentences for one day
Cite this Entry
“One day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one%20day. Accessed 7 Dec. 2025.
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