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
Just one day before the 2025 BET Awards are set to take over Los Angeles’ Peacock Theater on Monday night (June 9), a slew of the most prolific songwriters and producers across R&B and hip-hop convened at the Beverly Hills Four Seasons for the 2025 ASCAP Rhythm & Soul Awards on Sunday (June 8).
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Kyle Denis, Billboard, 9 June 2025
Judge Contreras’s decision came just one day after a federal court had struck down some of Trump’s Liberation Day tariffs.
—John Cassidy, New Yorker, 9 June 2025
Because their orbits are unstable, a possibility exists – however remote – that the asteroids could break off from their current trajectory and one day head on a collision course for Earth.
—Eric Lagatta, USA Today, 7 June 2025
Grief takes over the life of Chuck and his grandparents until one day his grandmother (Mia Sara) decides to cast it off.
—Katie Walsh, Boston Herald, 6 June 2025
See All Example Sentences for one day
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Kyle Denis, Billboard, 9 June 2025
Judge Contreras’s decision came just one day after a federal court had struck down some of Trump’s Liberation Day tariffs.
—John Cassidy, New Yorker, 9 June 2025
Because their orbits are unstable, a possibility exists – however remote – that the asteroids could break off from their current trajectory and one day head on a collision course for Earth.
—Eric Lagatta, USA Today, 7 June 2025
Grief takes over the life of Chuck and his grandparents until one day his grandmother (Mia Sara) decides to cast it off.
—Katie Walsh, Boston Herald, 6 June 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 13 Jun. 2025.
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