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

Fresh precursors can be pumped in through the veins, and one day they might be partly gathered from the environment. — New Atlas, 5 Nov. 2026

His announcement to retire came one day before Jesus released the roster for upcoming games against Denmark and Wales. — Steve Henson, Los Angeles Times, 5 Nov. 2026

The announcement comes one day before Rossum will appear at Raising the Prevention Generation, an invite-only event for survivors, allies and advocates, co-hosted by WME and RAINN. — Abbey White, HollywoodReporter, 5 Nov. 2026

Xia hopes the findings will one day lead to treatments for people who are especially prone to mental fatigue, such as those with depression and schizophrenia. — Cody Cottier, Scientific American, 4 Nov. 2026

Rhymes for one day

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