one day

phrase

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

This could one day enable mobile EEG monitoring outside a clinical setting, among other potential applications. — Jennifer Ouellette, ArsTechnica, 14 July 2026

Perhaps one day these gaps will close, but childhood will not wait. — Dana Suskind, Time, 14 July 2026

Thirty-eight hospitals were damaged by the earthquakes, with the main referral hospital in La Guaira exceeding capacity within one day, according to the IRC. — Mary Kekatos, ABC News, 13 July 2026

Then comes another character, Bernard, also young and who, while bathing one day, swims into a girl called Huguette. — André Aciman, Literary Hub, 13 July 2026

Rhymes for one day

• aaa
• alleyway
• alumnae
• anime
• anyway
• arete
• attache
• axillae
• baa
• beaujolais
• bouvier
• breakaway