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
Guthrie siblings post back-to-back videos addressed to captors The urgency to find Guthrie was apparent in an emotional plea posted in two videos released one day apart.
—
Sarah Lapidus, AZCentral.com, 7 Feb. 2026
The House Committee on Homeland Security is scheduled to hold a hearing next Tuesday and the Senate Committee on Homeland Security will meet next Thursday, one day before funding runs out for the Department of Homeland Security.
—Shaun Boyd, CBS News, 7 Feb. 2026
Four days per week are focused on technical skills, and one day is devoted to professional skill development, such as presentation and interview skills.
—Jacqueline Munis, Fortune, 6 Feb. 2026
The brothers learned recently that the mangrove forest just feet from their boat could one day be gone.
—Max Chesnes, The Orlando Sentinel, 6 Feb. 2026
See All Example Sentences for one day
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Sarah Lapidus, AZCentral.com, 7 Feb. 2026
The House Committee on Homeland Security is scheduled to hold a hearing next Tuesday and the Senate Committee on Homeland Security will meet next Thursday, one day before funding runs out for the Department of Homeland Security.
—Shaun Boyd, CBS News, 7 Feb. 2026
Four days per week are focused on technical skills, and one day is devoted to professional skill development, such as presentation and interview skills.
—Jacqueline Munis, Fortune, 6 Feb. 2026
The brothers learned recently that the mangrove forest just feet from their boat could one day be gone.
—Max Chesnes, The Orlando Sentinel, 6 Feb. 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 15 Feb. 2026.
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