one day

idiom

Definition of one day

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.

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Cite this Entry

“One day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one%20day. Accessed 29 Oct. 2020.

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