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

San Diego stayed alive with a 4-3 win Tuesday night in which Michael King, the Game 2 starter, earned a two-inning save on one day of rest to extend the season one more night. — ABC News, 8 Oct. 2026

Shimamoto hopes his work with the robust knit, as a proof of concept, can one day inspire stronger fabric design for manufacturing. — Emma Gometz, Scientific American, 8 Oct. 2026

The hurricane formed late in the season Isaias developed more than four months into the Atlantic hurricane season and was one day short of tying a 121-year-old record for the area’s latest-forming hurricane. — R.j. Rico, Los Angeles Times, 8 Oct. 2026

The same six or seven styles rotate under the spotlight year after year, with only a few new additions or washes, ensuring that our favorite jeans will have their time and place again one day. — Bianca Kratky, Glamour, 8 Oct. 2026

Rhymes for one day

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