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
Cousins’ comments come one day after videos of Tatum putting in some on-court work surfaced.
—
Justin Grasso, MSNBC Newsweek, 12 Dec. 2025
While the new clues may provide important background about the warriors, the authors hope further research can one day solve the mystery of the ship’s origin.
—Taylor Nicioli, CNN Money, 11 Dec. 2025
Now, the couple is taking their relationship one day at a time, hoping their story gives others a little courage — and maybe a bit of Irish luck.
—Amelia Mugavero, CBS News, 11 Dec. 2025
As many as 30,000 students missed school on one day during the crackdown.
—Jim Morrill, Charlotte Observer, 11 Dec. 2025
See All Example Sentences for one day
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Justin Grasso, MSNBC Newsweek, 12 Dec. 2025
While the new clues may provide important background about the warriors, the authors hope further research can one day solve the mystery of the ship’s origin.
—Taylor Nicioli, CNN Money, 11 Dec. 2025
Now, the couple is taking their relationship one day at a time, hoping their story gives others a little courage — and maybe a bit of Irish luck.
—Amelia Mugavero, CBS News, 11 Dec. 2025
As many as 30,000 students missed school on one day during the crackdown.
—Jim Morrill, Charlotte Observer, 11 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 18 Dec. 2025.
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