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
The TikTok comes one day after Bunnie shared a funny video with her step-daughter Bailee Ann, whom Jelly Roll welcomed in 2008 from a previous relationship.
—
Hannah Dailey, Billboard, 22 May 2024
The actress, 54, followed up her premiere appearance in Los Angeles with another in Mexico City one day later, walking the red carpet at the Plaza Toreo Parque Central on Tuesday, May 21.
—Jen Juneau, Peoplemag, 22 May 2024
See all Example Sentences for one day 
Hannah Dailey, Billboard, 22 May 2024
The actress, 54, followed up her premiere appearance in Los Angeles with another in Mexico City one day later, walking the red carpet at the Plaza Toreo Parque Central on Tuesday, May 21.
—Jen Juneau, Peoplemag, 22 May 2024
See all Example Sentences for one day
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'one day.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near one day
Cite this Entry
“One day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one%20day. Accessed 29 May. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share