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
Instead of flying to Los Angeles one day before kickoff — like the Hoosiers did before their 2024 matchup with UCLA — the team arrived three days beforehand.
—
The Athletic College Football Staff, New York Times, 2 Jan. 2026
Visitors will want to spend at least one day visiting nearby islands and hidden beaches, stopping for snorkeling and snacks along the way.
—Carley Rojas Avila, Travel + Leisure, 2 Jan. 2026
Parsons complied with Schottenheimer’s requests for all but one day of camp.
—Dallas Morning News, 2 Jan. 2026
The event was also registered close to The Geysers, one day ago.
—Ca Earthquake Bot, Sacbee.com, 1 Jan. 2026
See All Example Sentences for one day
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The Athletic College Football Staff, New York Times, 2 Jan. 2026
Visitors will want to spend at least one day visiting nearby islands and hidden beaches, stopping for snorkeling and snacks along the way.
—Carley Rojas Avila, Travel + Leisure, 2 Jan. 2026
Parsons complied with Schottenheimer’s requests for all but one day of camp.
—Dallas Morning News, 2 Jan. 2026
The event was also registered close to The Geysers, one day ago.
—Ca Earthquake Bot, Sacbee.com, 1 Jan. 2026
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 8 Jan. 2026.
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