one day
one
wʌn
van
day
deɪ
dei

Definition & Meaning of "one day"in English

one day
01

a time in the future, often implying hope or an uncertain expectation that something will happen at some point 

Grammatical Information
Examples
One day, we'll look back at these times and laugh. 
1.1

an unspecified or indeterminate time in the past, often used to introduce a past event or experience 

Examples
One day, I found a letter from my old friend hidden in a drawer. 
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