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

The flight is the first orbital hardware test under Project Suncatcher, Google’s research effort exploring whether clusters of satellites could one day host large-scale machine learning infrastructure. — Neetika Walter, Interesting Engineering, 24 Sep. 2026

But one day this summer, Woolard and her wife, Karen Geney, packed up their house in Grant Park and moved permanently to western North Carolina. — AJC.com, 23 Sep. 2026

Here's hoping one day breakfast will be included in your stay. — Condé Nast, Condé Nast Traveler, 23 Sep. 2026

The Beach Boys have suddenly canceled their September tour dates one day before the first of these shows was set to occur, casting further doubt over front man Mike Love’s health. — Devon Ivie, Vulture, 23 Sep. 2026

Rhymes for one day

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