one day
- idiom
- I hope to travel to Europe one day when I have enough money.
And you're going to be a legend one day, not now.
- And you're going to be a legend one day, not now.
- I just, I want you to one day write her follow up.
- So maybe I will one day, but I'm not ready yet.
- I'd like to have a house like this one day, and I did.
- You can be golden girl one day and discarded the next.
- With this help, they may one day be able to watch the Lions play.
- Guess now it is one day or day one.
- Like do you guys both want to be married one day one woman kids?
- I'll figure it out one day, One day woke.
- Well, maybe one day, maybe one day.
Examples
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The mouse family decided one day it would be nice to have a picnic.
Academic text (2011) -
Change had this way of sneaking up on you, one day at a time.
Fiction book (1990) -
I went there to give a talk one day about the book.
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So better to take one day, one day at a time.
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Until one day, when things started to change.
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If you are doing something special one day, drop them a line and invite them to stop by.
Academic text (2008) -
So maybe I will one day, but I'm not ready yet.
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I'd like to have a house like this one day, and I did.
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With this help, they may one day be able to watch the Lions play.
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After they had grown, they decided one day to go on a journey in search of wisdom.
Academic text (2008)
Synonyms
At a time that is not known, in the past or future
At a time in the future
Happens at a time that is early enough, not too late
At some point in the future
After a while
How Specific
Surface Forms
Morphology
The meaning 'at some unspecified time in the future' is directly derived from combining 'one' (a single) with 'day' (a day) and understood as 'a single day at some point' (i.e., 'someday'). This adverbial extension is cross-linguistically common and follows normal compositional semantics, so a B1 learner who knows the constituent words will very likely infer the intended meaning.
Etymology
One day uses the simple picture of a single day in the future when something will happen, like circling a date on a calendar but not naming it. So, people say one day to mean 'sometime in the future' or 'someday'.